Live large

Our extra large straw bottles are perfect for going the extra mile. Keep a generous amount of cool liquid with you, with plenty to share and no need to refill.

Shop 64oz
Torn paper
Water splash

TheJourney

...began in 2012 when we built a bottle that inspired adventurers to fill their flask, feel their best, and get going. We innovated a lid system to keep the cold in longer, make ice load easy, and never leak. We designed a satisfying hydration experience—one that gave a sustainable nod to the planet with every sip.

Finally, a bottle to love.

ADVENTURE AWAITS

To inspire, accompany and elevate life's adventures, one sustainable step at a time. We are there to explore all of them with you, wherever life takes you. Fill your ThermoFlask, feel your best, and get going.

Thoughtful Technology

Our intelligent Temp-Lock™ technology is engineered to lock in the temperature. It will keep the perfect temperature, just as you want. That’s how we truly elevate your life’s adventures: cold or hot, hour after hour, step after step.

OUR PART

By replacing single-use plastics with our sustainable ThermoFlask gear, you are consciously making a positive impact and joining the growing movement of eco-responsible adventurers.

Love my flask! I’d recommend it highly!

Suzee

I love that it does not leak all over their backpacks.

Beach365

Really great value and easy to clean.

Dillon J.

Out in the sun at 90 degrees for over 5 hours, my water was STILL COLD!

joyssiiaann

Keeps my kids water cold all day.

Emily J.

Perfect for school and sports.

AGmomof4

They are a great size, plus a great value.

Jeanette M

Love my flask! I’d recommend it highly!

Suzee

I love that it does not leak all over their backpacks.

Beach365

Really great value and easy to clean.

Dillon J.

Out in the sun at 90 degrees for over 5 hours, my water was STILL COLD!

joyssiiaann

Keeps my kids water cold all day.

Emily J.

Perfect for school and sports.

AGmomof4

They are a great size, plus a great value.

Jeanette M

Blog

Smarty Sweets Coloring Pages

Celebrate our Smarty Sweets drop with free coloring pages! Click here to download the pages, print and color! And don't forget to show off your masterpiece on social and tag @thermoflaskusa on Instagram with #smartysweets to be featured!  

The Cobalt Collection

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The Cobalt Collection

It curls over surfboards and fills the sky with a deep blue backdrop that’s perfect for fluffy, white clouds.

Your Bottle Planted a Tree

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Your Bottle Planted a Tree

The ThermoFlask team traveled to Laguna Canyon and planted Coastal Live Oak trees at Laguna Canyon Foundation in participation with One Tree Planted. Also, with every purchase of a ThermoFlask reusable bottle, you have helped prevent over 2 billion single-use plastic bottles from littering our coast and our trails throughout the past...

Which ThermoFlask Lid is Best For You?

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Which ThermoFlask Lid is Best For You?

Design your favorite hydration experience with 6 of the Best Lids Ever™: Straw or Spout with 3 handle styles: swivel, wide swivel, and fixed loop.

Celebration Drinkware for Backyard Adventurers

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Celebration Drinkware for Backyard Adventurers

You’re going to love our new Celebration tumblers! Courageously formal, unabashedly unbreakable, and in one bespoke color that matches every outdoor atmosphere, they’re a gorgeous addition to your backyard drinkware—the perfect accompaniment to any outdoor gathering. 

ThermoFlask’s Water Bottle Sling: An Adventure Essential For Day Trippers + 6 Trail Tips

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ThermoFlask’s Water Bottle Sling: An Adventure Essential For Day Trippers + 6 Trail Tips

There are 193 million acres of forests in the United States, and many of those acres are protected in over 100 national forests. When you hit the trail to find that oh-muh-gawwd spot that fills your IG feed, be a good nature steward and hike responsibly: choose sustainable, eco-friendly options...

The Plum Collection

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The Plum Collection

As happy on a bicycle as it is clipped to your backpack, this fruity color—plum!—takes a queue from the quiet side of nature. 

How to Keep Your ThermoFlask Bottles Clean

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How to Keep Your ThermoFlask Bottles Clean

Learn how to keep your bottle clean with these expert tips & videos.

5 Valentine's Day Views

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5 Valentine's Day Views

What better way to celebrate the most romantic day of the year than an excursion with picturesque views, cooler charcuterie, and a chilled bottle of bubbly? From your backyard patio to a backcountry mountain peak, celebrate with our elegant Celebration Drinkware Collection designed for outdoor experiences.

6 Winter Hiking Tips To Stay Hydrated and Happy

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6 Winter Hiking Tips To Stay Hydrated and Happy

When you’re heading out to hit the trails, whether that’s a one hour hike or a day journey, here are six things you should always do to make the adventure a great one...

Top 4 Holiday Gifts For The Adventurer On Your List

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Top 4 Holiday Gifts For The Adventurer On Your List

Struggling to find that perfect gift for the adventurer on your list? We’ve got you, best gift-giver ever! Toss the clunky gizmos and gadgets and wrap up something they’ll love: an experience! We’ve rounded up four high-energy “get-out-there” things to do and paired them with thoughtful hydration gear that will fuel...

Five Best Fall Views

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Five Best Fall Views

This is the best time of year to explore the great outdoors! Lace up your hiking boots and hit the trails hands-free with one of ThermoFlask’s bottle slings—we have three different styles to suit every adventure!