Originally Posted by
nkfrench
...
I tried keeping the hydration bladder in the freezer between rides, but the gasket tends to freeze shut and the bladder will be a little disformed. It worked out better for me to completely empty and air out between rides and refill before riding.
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When I bought my Camelback,the manager at the LBS told me that he keeps his in the fridge between rides to reduce mould problems...
I use the Camelback to carry things -- but I have not yet used the bladder, so I can't really comment.