GSI Outdoors Boulder Flask 16 fl oz

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It’s an instant classic. This no-nonsense, good-sized flask is lightweight, durable and easy to use. No matter what you intend to fill in with, water, milk or something more substantial, this is a great flask for taking with you.

GSI Outdoors says: 

Lightweight, ruggedized hip flask. Your favourite beverage can now go anywhere in the Boulder Flask. Includes graduations for measuring and can take any fall with the sleek bumper flask.

Our Verdict

The GSI Outdoors Boulder Flask is a classic, no-nonsense flask that is lightweight, durable, and easy to use. It holds 470ml of your favourite beverage, and its clear sides let you see how much is left. The silicone grip provides stability and durability, and the rubber screw top makes it easy to open and close. The shatter-resistant plastic makes it perfect for camping trips, and the BPA-free plastic is safe for your health. The intelligent use of the silicone bumper makes it even more comfortable to hold.

– Reviewed by Ultralight Outdoor Gear

Features

• Shatter-resistant, copolyester resin body and grippy, silicone bumper mean this flask can go anywhere
• Wide mouth makes for easy filling, pouring and drinking
• Hinged, stay-open top with silicone grip is easy to open and impossible to misplace
• Convenient molded graduation marks

Specifications

• Weight: 200g
• Dimensions: 4.3 in x 1.3 in x 7.8 in
• Volume: 16 fl. oz

Material & Construction

• Copolyester, Silicone