The Plum Collection

From wildflowers that cover the California mountains, to that pretty shade of purple that clings to the clouds before the stars take over, to fruit stacked high at farmer's markets, plum comes from the earth.

Torn paper
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! They keep icy drinks cold for a super long time and are very easy to clean

Shelby M.

You can customize which lid you prefer that day with the option to choose between a chug and spout cap

People Magazine

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

joyssiiaann

Keeps my kids water cold all day and is easy to clean in the dishwasher!

Emily J.

Really great value, large size and easy to clean. Love the rubber bottoms making it a lot quieter to set down

Dillon J.

I use these water bottles everyday! They keep icy drinks cold for a super long time and are very easy to clean

Shelby M.

You can customize which lid you prefer that day with the option to choose between a chug and spout cap

People Magazine

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

joyssiiaann

Keeps my kids water cold all day and is easy to clean in the dishwasher!

Emily J.

Really great value, large size and easy to clean. Love the rubber bottoms making it a lot quieter to set down

Dillon J.

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.

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

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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...

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.