for the past hour, instead of packing for my trip, i have been trying to install this cover onto my bite valve. it will not budge, and although some other reviews make it out to be really easy to install, I cannot for the life of me get it on, and i can't even see how it's possible to sit flush like it was obviously intended to. There just isn't enough room within the ring to fit the soft part, but since I can't fit it, it won't sit flush with the red plastic bit. There are no instructions, none of this is obvious. Save your time and money.
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