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Two females in a hammock and one male in a hammock smiling and passing a ThermoFlask insulated waterbottle.

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.

I use these water bottles everyday!

Shelby M.

Really great value and easy to clean.

Dillon J.

Keeps my kids water cold all day.

Emily J.

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

joyssiiaann

You can customize which lid you prefer.

People Magazine

I use these water bottles everyday!

Shelby M.

Really great value and easy to clean.

Dillon J.

Keeps my kids water cold all day.

Emily J.

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

joyssiiaann

You can customize which lid you prefer.

People Magazine

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.

How to Keep Your ThermoFlask Clean

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How to Keep Your ThermoFlask Clean

How to keep your ThermoFlask bottle, lid, and o-rings clean.

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!

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. 

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

Blog

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...