Kool8 - Your Fully insulated, Durable & Eco-friendly water bottle

$42.99 $34.99
$42.99 $34.99
  • FREE same-day shipping with orders placed before 5pm CST (we ship out of Chicago, Il)
  • 100% SSL secure checkout technology via Stripe payment gateway


Your next-gen stainless steel water bottle to take everywhere. Perfect to keep your cold drinks cold and warm drinks warm, the leak-proof Kool8 water bottle helps you stay alert and refreshed throughout your day.


Water, tea, coffee, iced macchiatos - whatever your drink of choice, Kool8’s double wall vacuum insulation safeguards the temperature. Condensation-free.


The durable Kool8 stainless steel metal water bottle stands up to wear and tear to keep your bottle looking like new, longer.


At 18 oz. this small water bottle won’t weigh you down, and fits easily in virtually any bag.



Keeps your drinks tasting great, wherever you go.

Strong as steel

Minimize dents and scratches to your water bottle with Kool8’s stainless steel construction.

Temperature controlled

Double-walled vacuum insulation keeps your favorite drinks cold or warm for 12+ hours.

Leak free

'Nuff said.


Why limit your water bottle to only water? Use Kool8 to carry your favorite tea, coffee and more.

Socially conscious

Drink well, do good. We donate 20% of all profits to bring clean water to those in need.

The perfect fit

Toss your Kool8 water bottle in almost any gym bag, backpack or purse. Wherever you go, Kool8 fits right in.

Product details

  • Dimensions: 12.4 in x 2.55 in
  • Weight: Up to 18 oz./500 ml
  • Extras: Tea infuser (included FREE)
  • Colors: [Slate] Gray, [Fiery] Red, [Mint] Green
  • Warranty & Support
  • Free exchanges up to 6 months after purchase.
  • 2.55 in

    12.4 in


    Processing time All orders are processed within 24-48 hours max.
    FREE US shipping Kool8 offers free US shipping on all orders
    Expediated shipping For $10 extra, you can get the Kool8 bottle delivered in 48 hours
    International shipping Contact us at [email protected] if you live outside of the US. We do ship international. Additional shipping fees apply


    5 / 5 out of 68 reviews

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    • out of 5
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    • out of 5
      porno izle
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    • out of 5
      kacak bahis siteleri
      Real nice style and superb subject material , practically nothing else we want : D. Mohamed Carpinelli
    • 5 out of 5
      Probably the best water bottle i had to keep water hot throughout the night.
    • 5 out of 5
      Bob J
      Well, all around this product is pretty amazing in normal usage. I needed an insulated bottle to use from cold-iced water to git tea when needed. I have to say the 8-hour ice hold inside this bottle is pretty impressive. I also am loving the 8-hour scalding hot cocoa that stays the perfect temp, even overnight. I currently have no problems.
    • 4 out of 5
      Feels high quality and you know you’re getting high quality. Only complaint is it cannot be put in a dishwasher.
    • 5 out of 5
      I owned a Kool8 for 3 years now and I lost mine in an Uber recently. I bought a replacement and I was so happy to see that 3 years later nothing changed regarding the quality, shape and color of this product. Strongly recommend it.
    • 5 out of 5
      I drink more water than ever before now with this bottle. I make my own CBD tea mix at home before i go to work and it's still warm at 5 pm.
    • 5 out of 5
      my wife loves this bottle so much.
    • 5 out of 5
      Carmen Pineda
      I bought this one after having a defective Hydroflask sent back to Amazon. After 3 months of using it, I'm still super happy with the quality of this bottle.
    • 5 out of 5
      Andrew K
      I bought this to replace a bottle i lost at the gym. Anyway, this bottle is way better, it's slim enough to fit in bottle holders. Love the neon green
    • 5 out of 5
      Elizabeth Norris
      Best bottle I own.
    • 5 out of 5
      great bottle
    • 5 out of 5
      Jose A
      It is very light weight. Very comfortable and easy to carry, it keeps my water cold all day or all night.
    • 5 out of 5
      Dorella Ames
      Pros: double insulated, leak proof, sleek design, vibrant colors. Cons: has to be hand washed, no dishwasher.
    • 5 out of 5
      Matthew James
      Great bottle. I take it to the gym every day. It fits perfectly in the elliptical cup holder. I love the grip and the shape.
    • 5 out of 5
      Johanna Butler
      I love this water bottle. It's very light and convenient. Super easy to carry it around, not heavy even when full. When I put ice in it, it usually takes about 6-7 hours until the ice melts.
    • 5 out of 5
      I may be vain, but this bottle is super gorgeous. I have the green lime color. I'm super happy I found this bottle. I also had a few questions before buying it, and customer service replied within minutes (wow).
    • 5 out of 5
      Tim Tyler
      Beautiful vibrant color, easy to use, and leak proof.
    • 5 out of 5
      Marisa A
      This bottle is so good, I'm obsessed with it. My boyfriend jokes I love it more than I love him.
    • 4 out of 5
      Lauren Dunn
      I originally bought a Hydroflask. And to be clear, I like that bottle too as well. But the hydro bottle is way too bulky and awkward to hold so I gave it to my husband, who loves it, and I bought this one instead. Kool8 meets all my needs, it's EXACTLY what i wanted, and it never slips out of my hands. I recommend this product.
    • 5 out of 5
      I hope Kool8 team has a sense of humor and publishes my review. Yes, I'm man enough to admit it. I use this bottle to drink cold beer walking on the street. Yes, it keeps it cold. Yes, it's a fine bottle. And yes, i got it so I can drink out of it when I walk my dog on the streets of Miami.
    • 5 out of 5
      JJ Kroscher
      You must have this bottle. You won't regret it. I was never a huge water drinker, but using this bottle makes me drink more water. A LOT more.
    • 4 out of 5
      Best bottle I have. I'm glad I discovered this bottle. It was delivered the day after I ordered it, but since I live in Chicago, and the company is local, I'm sure this is not the same for everyone.
    • 5 out of 5
      M. Roland
      I bought this for my daughter. She loves it. She uses the tea strainer every day with loose tea leaves. She also said it's very easy to clean. So based on her feedback, I will give it 5 stars.
    • 5 out of 5
      Sam Blake
      Sturdiest, prettiest bottle. I bought 11 of them for all my family for Christmas. I called the company telling them I plan to buy a bunch of them. They were so nice, they even gave me a 15% code for a bulk order. Also, they even shipped all 11, to 5 different states, with expedited shipping at no additional cost. This company is the best. Like really, I can't believe how customer-friendly these guys are.
    • 5 out of 5
      Morgan Peyton
      I originally bought the red slim bottle back in 2017. For me, it's the perfect size. I know some reviewers complain it's too small (only 18 ounces), but for me, this is perfect size. I was so saddened when I lost it at the airport last month. I was so upset my husband bought me another one right away. And now I'm whole again. Oh, and I must say the bottle has no condensation at all with cold or hot liquid. Really love that.
    • 4 out of 5
      Just a customer :)
      What a great water bottle. I'm happy I chose this one. This bottle never leaks, it's super ergonomic, and it works as advertised. My only beef is that the mouth of the bottle is not super wide. So it's a bit annoying when i add ice to it. Maybe the next bottle they launch would have a much wider mouth? That's it, really, my only complain about it.
    • 4 out of 5
      Jessica M
      I think I've owned more than a dozen water bottles in my life. This is probably one of the best. It works like a charm, it had a great finish, and it is attractive looking.
    • 1 out of 5
      Decent bottle but too small.
    • 3 out of 5
      Scott R
      The only reason I am giving it 4 stars is because the box doesn't make it super clear that the bottle is NOT machine washable. That destroyed the bottle. But after I reached out to their customer support and shared pictures of the damaged bottle, they sent me a replacement for free, no other questions asked. After that, I haven't had any additional issues at all. Great company, great customer service.
    • 5 out of 5
      Maria G
      Super high quality bottle. Very robust. Easy to carry around. And people keep commenting on how good looking it is.
    • 5 out of 5
      Brian Zhu
      I take this water bottle to the gym every single day. I've even dropped it a few times while on the elliptical. No matter, bottle is still intact. And it really keeps my coffee warm all day long. Plus it helps to know that my purchase helps others in need.
    • 5 out of 5
      Melody Lewis
      I love the bottle. And the packaging is so cool too!!!
    • 5 out of 5
      Jennifer Markly
      I've had this bottle for over a year. Even if they say not to put it in the dishwasher, I must admit, I did it anyway. And quality is still strong.
    • 5 out of 5
      Alexandra Wilmington
      This is my favorite companion, alongside my sunglasses (I live in San Diego after all) and my cellphone. It never leaks and it fits comfortably in my purse. Love it, love it, love it!
    • 5 out of 5
      Mark Edgar
      Customer service is great. First delivery came in a bit damaged (clearly damaged in transit by USPS). They made it right immediately and sent a replacement and dealt directly with USPS. I shall order from them again.
    • 5 out of 5
      Gary Johnson
      Super product. Comes exactly as advertised. I live in Indiana and I got the delivery the next day after placing the order, I assume it's because they ship it out of Chicago.
    • 5 out of 5
      Nathan Lynch
      This was a present for my best friend's birthday. He digs it. I got the neon color and it looks so cool. I just placed another order today for a second bottle for my mother.
    • 5 out of 5
      Judy Rana
      I take this bottle with me everywhere.
    • 4 out of 5
      Andrea M
      Really nice, small bottle. Love it. I fill it up with coffee at home, now with the virus around, and work all day. My coffee stays warm forever.
    • 5 out of 5
      Chris Frontiere
      Great stuff. Love the design. Dropped it on my kitchen tiles - bottle was intact!
    • out of 5
      Bruno Pereira
      What a helpful guide to making the perfect cup of tea. As a side note, it is best to opt for loose leaves that are long and curled. They should be uncut for maximum flavor infusion.
    • 4 out of 5
      Kate Klein
      I bought this water bottle so I can drink more water now that I'm pregnant. My friend had one so I got to "test it out" before buying. So far, it's been great. The bottle is exactly as advertised no BS marketing or unexpected surprised. 5 stars from me.
    • 4 out of 5
      Roberto Ramirez
      I finally got my Kool8 bottle in the mail. First off - kudoz to the team. The box design is super nice. And the hashtag "Glad to be with you" is sweet. I live in San Diego. So I was skeptical that this bottle can do what it claims. I put water with ice in the bottle and left it outside on my balcony for 5 hours at 72 degrees. After 5 hours, the ice had not melted yet. So yeah, very good stuff.
    • 5 out of 5
      Adam G
      I really like green bottle. It's on the smaller side and it fits perfectly in my car's cup holder. Nice touch with the tea strainer.
    • 5 out of 5
      Quinn Lloyd
      I don't usually leave reviews, because I'm busy with 2 toddlers and a dog. But I felt I should spend 1 minute and tell everyone that this bottle always keeps my drink hot or cold. And that my girlfriends always joke of stealing it instead of coming to this website and buying the freaking bottle for themselves.
    • 5 out of 5
      Isabella Bates
      This is the fifth Kool8 bottle I bought. And I love it. I really hope my kids stop losing them.
    • 5 out of 5
      Harley Bowers
      I have to imagine that 90% of the people who buy a water bottle are like me. The Koo8 stainless steel water bottle is on my remote desk almost 100% of the time. For that purpose, this bottle is perfect. I make myself a nice coffee in the morning and it never gets cold - of course, that's because i finish drinking it within 3-4 hours. Buy the red version - that's my favorite.
    • 5 out of 5
      Leah Dawson
      It's very compact. Never leaks. Never had a problem.
    • 3 out of 5
      Josh Morris
      I think the bottle is a bit too small for my taste.
    • 5 out of 5
      Sienna Hudson
      This is a good bottle.Pros: - super easy to fill - good looking - super easy to drink from - doesn't drip AT ALLCons - you need smaller ice cubes. - doesn't hold a LOT of water.
    • 3 out of 5
      Nicholas Evans
      The bottle was too small for my taste, but my wife loved it. So she has it now and I'm buying a bigger one.
    • 4 out of 5
      Melody Thomas
      My girlfriend game the Kool8 bottle a name: The Mighty Midget. Lol. So the bottle itself isn't THAT small - holds about 16 ounces of water. It's great to drink from at the office, on the go, in the car. Definitely not as versatile as some of the larger bottles but for me - it does the job.
    • 5 out of 5
      Ava Chen
      I bought a couple of them because they are of super good quality. The cap is made of stainless steel as well. Which is great because there's ZERO chances of spillages.
    • 4 out of 5
      Jane Paterson
      I really needed a water bottle to help with my weight loss journey. The Kool8 water bottle did the trick. I personally REALLY like that this bottle isn't huge. Some may find it a turnoff, but I truly think this is as big a water bottle should be. It's a bit difficult to fill it up with regular-sized ice cubes - that's my only complaint.
    • 5 out of 5
      Taylor Wright
      I use the Kool8 water bottle 4-5 times a week. No cracks, no deterioration in quality over time. They say now to wash it in the dishwasher, but I did, and still no issues.
    • 5 out of 5
      Dwayne Cole
      I bought this as Christmas present for my girlfriend. She's really digging it.
    • 4 out of 5
      Avery Clark
      I've been using this bottle for almost three months now. I've dropped a few times on concrete a few times. It has some scratches but zero cracks. I recommend this bottle.
    • 5 out of 5
      Nathan Reynolds
      I bought this bottle primarily due to its sleep design - and it didn't disappoint.
    • 5 out of 5
      Kyle Gallagher
      Amazing stainless steel water bottle. Customer service was great too. They immediately took care of me after I mistakenly placed the order twice.
    • 4 out of 5
      Harley Kline
      I've had this water bottle for one year. I'm really upped my hydration game due to this lovely water bottle.
    • 5 out of 5
      Alexandra A
      Recently bought this water bottle recommended by a friend. Worth every penny! The insulation and texture is well made. Keeps my beverage at the ideal temperature for hours on end
    • 5 out of 5
      Andrea Stone
      This is a very good and sturdy water bottle. And everyone at work asks me where I bought it for, complimenting me on its looks and feel. Love it.
    • 4 out of 5
      Jason Brodigan
      A bit smaller than I would have hoped. But still hold 16 ounces of liquid easily.
    • 5 out of 5
      Ashley West
      This bottle is awesome. I bought one for my mom and she likes it too.
    • 5 out of 5
      Emily Williams
      I bought four bottles, one for each of my kids and myself (I'm a single parent.) We have now owned these bottles for over a year (bought it originally the summer of 2018. After all this time, there is no scratch on the surface at all. I even dropped it at home, and it is intact. If you have children aged 10-15, you know how important this is.

    Unparalled techonolgy

    Kool8 keeps your dring cold up to 24 hours and hot up to 12 hours.

    Straight from our customers
    This water bottle is phenomenal. It is uncanny to drink a cold brew that's one day old and to not be able to tell the difference.

    Eco-friendly & BPA free

    One durable water bottle, thousands of plastic bottles saved. Kool8 is environmentally responsible and BPA free.

    Straight from our customers
    Geez, I think I probably saved over $1000 bucks and at least 500 bottles since I got my Kool8 bottle a year ago. It feels darn good!

    Tea-lover approved

    Stay calm, stay vibrant, stay healthy. Tea lovers will rejoice with a bottle that supports all your favorite teas.

    Straight from our customers
    I drink loose tea every single day. The strainer is God-sent. So simple and elegant. I don't get why the tea strainer is not mandatory to ALL water bottles. You guys totally rock!!!

    Our mission

    We designed Kool8 to be the bottle that does good, looks good, and keeps your beverages tasting great.

    Every time you buy a bottle, 20% of the profit goes towards delivering clean water to underprivileged regions in the world, and the people there that need it most. And with each purchase you make, we’ll show you how you’re making a direct difference in their lives.

    The Stainless Steel Water Bottle Buyer's Guide

    They're functional. They're cool, and they're durable, and bang on trend. You've seen them attached to bicycles and tucked cozily into backpack pockets. You've spotted them at the gym, on the trail, and in passing on the street. They come in sleek modern shapes and they're decorated in dashing colors and screen prints. They're must-have items.

    And everyone seems to have one of these items but you. But what are these things you crave so badly? They're stainless-steel water bottles, the perfect way to keep you hydrated for the long haul, as well as showing off your super-cool style.

    This guide tells you everything you need to know about stainless-steel water bottles–why they're great, how to pick the right one, and how to make sure yours lasts.

    Why Do I Need a Stainless Steel Water Bottle?

    There are many reasons to choose stainless-steel bottles over the alternatives. Here are only the top few:

    How Do I Choose a Stainless Steel Water Bottle?

    Some of the ways in which stainless-steel water bottles differ include…

    Size: Single-serving 8-ounce bottles are great for kids. Larger-capacity bottles hold up to as many as 40 oz, though 16-25-oz capacity typical. Three to four of those per day meet the hydration requirements of most active people.

    Shape: Stainless-steel water bottles come in a variety of shapes, including straight, tapered, and ergonomic grip. Hold each option, considering what will be comfortable and whether it fits where you need it to.

    Insulation: Stainless steel is a reasonable insulator in its own right, but some bottles offer foam insulation or a double-walled construction, where the bottle comprises two layers with an air cushion in between. These bottles can maintain the temperature of your drink for hours on end.

    Closure: A stainless-steel bottle may have a screw cap, or a sport cap with a spout--handy for in-exercise refreshment. It may also have a fastening grommet to attach a carabiner clip, strap, or other fastener to prevent loss.

    Drink Delivery: Some stainless-steel water bottles have no sipping spout or straw, so unscrew the cap and drink from the wide mouth. This is very satiating but for more controlled consumption, look for a bite-valve, spout, or flip straw.

    Color and Design: Stainless-steel water bottles come in a variety of vibrant, innovative colors and designs. Express yourself! You may even be able to order a custom water bottle, so let your flag fly!

    Other Features: Some stainless-steel bottles feature cool extras. The Kool8 stainless-steel water bottle features a built-in tea infuser, an excellent bonus for tea lovers.

    Manufacturer: Look for an ethical company with a strong social conscience and exploitation-free practices. Kool8 is proud of its commitment to sending water and free bottles to parts of the world where clean water is not widely available.

    Beware of: Avoid aluminium bottles that look similar to stainless steel but without the advantages. They are less durable and less resistant to bacterial growth. Some even rust.

    Run away from bottles with inner plastic linings that make your water susceptible to BPA and other carcinogens or chemicals, just like a plastic water bottle.

    How to Use My Stainless Steel Water Bottle?

    Here are the best ways to put the stainless-steel water bottle to use...

    Water on-the-go: Fill with H2O from the tap, filter, or jug and take it with you. No mess, no fuss, no expense, no hazards, and these bottles sit beautifully in the cup holder of a car or the bottle pouch of a backpack--on city streets, in the office, or camping in the backcountry.

    Keep your cool!: Keep cold drinks cold for up to 24 hours. Take your bottle to the beach or in the sauna. It's also fabulous for long, overheated coach or car trips.

    It's all heating up…: A well-insulated stainless-steel bottle can keep hot drinks like tea or coffee nice and steamy for up to six hours. Take this baby hiking in fall, or even take one to bed on a wintry night.

    Shake it up!: No cocktail shaker available? Thanks to the gasket-sealed lid, a stainless-steel water bottle makes a great substitute! It's also super hygienic as a shaker--you can rinse it with boiling water first, ensuring no contamination.

    Tantalizingly tasty…: Stainless steel does a better job than materials like plastic or aluminum in preserving the flavor of the drink you keep in it. Some people notice a metallic taste early on, but this usually goes away after a few washings.

    Double, double, no toil and...no trouble!: Some people rely on different beverages for different uses—for example, coffee for caffeine, water for hydration, tea for antioxidants, etc. So, why not get a second stainless-steel water bottle, or even a third? Different colors can denote what each one's used for. One for water. One for soup. One for shakes.

    How to Care for My Stainless-Steel Water Bottle?

    With a few simple care techniques, your stainless-steel water bottle could last your entire lifetime. Here's how to keep your bottle clean and safe …

    Soak & Rinse: Keep your stainless-steel water bottle clean by soaking and rinsing it with dish soap and water after each use, and don't let it sit and stagnate with the dirty dishes. This is especially necessary if you use your water bottle to transport non-water beverages like juice or coffee. Fill it with boiling water to give it a sterilization but don't scrub at that stunning outer coating.

    Deep clean: Occasionally, your water bottle may benefit from a deeper clean. For a safe, natural and non-toxic clean, mix white vinegar in a solution with water and use it to soak and rinse your stainless-steel bottle every now and then.

    Not a heavy metal fan?: Some people notice that their stainless-steel water bottle gives drinks a mildly metallic taste. Don't worry, it's only a characteristic of new bottles. The metallic flavor should dissipate after the first few washes. Gentle soapy suds and an air dry with the cap off are enough to sort this out.

    Dishwasher delight?: Stainless steel does fine in the dishwasher, but if the bottle is insulated or powder-coated (the fine, colored paint finish), dishwashing could damage it. Wash your precious bottle gently and with care, ensuring its longevity.

    Dents and scratches: A well-built stainless-steel water bottle is built like a tank. It will survive a drop off the roof of your house. However, with heavy use, the water bottle might acquire some dings and scratches.That's natural and these imperfections do not compromise the water bottle's functionality. You can, however, prevent this by always transporting the bottle in a soft cloth.

    Don't Lose It!

    Your water bottle will be so robust that you're far more likely to lose it than break it. Life is busy, stainless-steel water bottles are portable, and they are easy to misplace, forget, or leave in the hotel room before you board a plane. Some unscrupulous thief might even find your awesome water bottle irresistible...

    You'll be upset to lose your best stainless-steel water bottle, so consider attaching it to your luggage with a carabiner or other fastener to reduce the likelihood of forgetting it somewhere.


    Stainless steel water bottles are the best way to take your favorite drink with you. If you rely on plastic bottles, cups, or—worst of all—single-use water bottles, it's time to get a hardy stainless-steel water bottle into your rotation. There's no reason to delay, since the advantages of stainless-steel water bottles are limitless.

    The choices of stainless steel water bottles are almost endless too. So, we think you should make it simple on yourself and go for robust build quality and stunning esthetics equally. Love your new bottle well, and it will quench your thirst your whole life long.

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