Storing Drinks Bottles?

[Fab Foodie]

Blimey. some people make life difficult.
Just wash and make sure they're dry before you store 'em. Lid-off or lid-on with valve open. Nothing will grow if they're kept dry.

 

[Sheffield_Tiger]

It's habit for me since I store my platypus bladder in the freezer too (not easy to completely clean or completely empty)

Since I'm not that big on frozen foods, there's plenty of room