Ocean Bottle Brew Flask Review

Ocean Bottle Brew Flask Review by Erin Trail The Ocean Bottle Brew Flask is a leak proof coffee flask that is ACTUALLY leak proof! Capacity: 12 oz Materials: Recycled stainless steel, BPA-free plastic, silicone Insulation: Double-wall vacuum Dimensions: 2.6 x 6.7 in Weight: 0.49 lb Care: Dishwasher-safe and easy hand-cleaning Warranty: 10 years Impact: 25 lb…

Erin Trail

March 11, 2026

3–4 minutes

coffee, insulated bottle

Ocean Bottle Brew Flask

Review by Erin Trail

The Ocean Bottle Brew Flask is a leak proof coffee flask that is ACTUALLY leak proof!

Capacity: 12 oz
Materials: Recycled stainless steel, BPA-free plastic, silicone
Insulation: Double-wall vacuum
Dimensions: 2.6 x 6.7 in
Weight: 0.49 lb
Care: Dishwasher-safe and easy hand-cleaning
Warranty: 10 years
Impact: 25 lb of ocean‑bound plastic collected (1 000 bottles)

As an endurance athlete, I am always looking for a way to keep my coffee warm while I’m on the go. Another pet peeve of mine is lids that leak, either in transit or while you drink from it. The Ocean Bottle Brew Flask has solved both of these issues.

The Ocean Bottle Brew Flask has a 360º leak proof, lockable lid, which lets you sip from any angle without drips or leaks. The lid design is intuitive, simply twist to open or close. While closed, the lid is secure enough where I felt comfortable chucking the flask in my bag as I walked from my car into the office. For commuting, the flask easily fits into a vehicle cupholder or into a bottle pocket in a backpack.

Another great feature about the Ocean Bottle Brew Flask is that it is 100% dishwasher safe. No hand washing needed!

The Ocean Bottle Brew Flask is insulated enough to keep your hot drinks hot for up to 6 hours and cold drinks cold for up to 18 hours. I didn’t successfully test these metrics because – let’s face it – my coffee gets consumed pretty quickly once I arrive to the office.

The only thing that would make the Ocean Bottle Brew Flask perfect is if it were offered in larger sizes. Twelve ounces isn’t quite enough caffeine for this endurance athlete.

The Ocean Bottle Brew Flask is available in twenty different colors.

Erin Trail

Trail Boss of Stoke

Erin Trail’s hobby is collecting hobbies. She’s a 5th Generation Coloradan and grew up exploring the outdoors on family camping trips and hikes. Her first backpacking trip was at eight years old to Grizzly Reservoir – she proudly carried all of her own gear those 3 miles from the main parking lot to the Reservoir.

Erin is an adult-onset athlete who started as a Masters Swimmer and then developed into a triathlete. She has completed 5 Ironman races and nearly 20 x 70.3 distance Ironman races, including the World Championship in Lahti, Finland, in 2023. In 2025, she raced for Team USA in Pontevedra, Spain for the World Triathlon Cross Tri World Championship. She placed 9th in her age group and was the 1st American woman in her age group.

Erin Trail on her mountain bike at the World Tri Cross Triathlon World Championship race

Erin Trail on her running at the World Tri Cross Triathlon World Championship race

Somewhere along her triathlon journey, she picked up deep love of cycling. Cycling encouraged her to see landscapes in a new way, learn new skills and to develop self reliance; now she often goes and does Type 2 rides just to see if she can do it. She’s got all the bikes: gravel, mountain, fat bike, time trial and road.

She is even known to combine her love of camping and cycling and go off on solo 24 hour overnight bikepacking trips in the mountains of Colorado. In addition to bikes, she teaches yoga, lifts weights, skis, SUPs and has recently purchased a campervan.

Erin is a former Montana park ranger with a degree in environmental engineering. She loves getting into technical details while putting her gear (and herself) through the paces. She shares her home in Colorado with her husband, Will, and her 3 cats (Zipper, Brewtus, and Simcoe).

Fall and winter 2025 will bring Erin to the “Adventure Side”, with many camping, vanlife, bikepacking, and mountain bike rides. Once the snow flies, she can be find resort skiing, fat biking, and triathlon training (inside and outside).

2026 will bring a National Championship Cross Tri race, a National Championship Road Sprint and Olympic Distance race, and hopefully a chance to represent Team USA once again in 2027 in Edmonton, Canada. She’ll also save lots of room for adventure time with her friends and husband.

When not adventuring, she can be found on a sunny patio somewhere, drinking beers with her husband.

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