Where to Buy

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Retailers' Descriptions

Here's what other sites are saying:

The GU Flask combines squeeze-tube convenience with 5.5 ounces of GU (that's five packets, enough for a 5-hour workout). The Flask's clear plastic body lets you see how much of a charge you've got left, and it's dishwasher safe, too. Clear in color with GU logo. Weighs 0.6 ounces.

- Altrec Outdoors

The GU Flask combines squeeze tube convenience with 5.5 oz. of GU (fill with 5 packets of GU (not included), enough for a five hour workout). The flask's clear plastic body lets you see how much of a charge you have left and it's dishwasher safe too.

- Campmor