We wear our Camelbak backpacks when we ride our bikes and the Ergo closure is great - it fits easier into the helmet than a straight flap and the on/off button does the job keeps us from sitting on the open valve and pouring the liquid on ourselves and on our friends at the restaurant (yes it happened). The problem is that the rotating part of the valve is only held in place by friction. Catch a closed flap on any part of your clothing and it will easily come loose and get lost. It happened to me once and my husband twice while we were driving. That's why I'm buying another one here at Revain! A small change in the design of the valve including a rib inside the valve to snap it in place, something like that would solve the problem and make it a 5 star product. .
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