This is a collection of inserts that are useful to insert into hydration bladders for the purpose of propping the sides apart so they dry faster and more thoroughly. I'm currently in training for an ultra marathon so I'm using bladders more often but even though I just use water I still worry about bad things growing in them so I like to swap between them and let them dry out between uses.

The inserts come in a variety of sayings including blank to save filament.

The size is such it should fit most bladders, at least it fits my Source, Platypus and Camelbak bladders. The hook part is designed to accommodate a variety of bladder makes so it may be too wide a gap for your specific bladder. In this case just heat it slightly with a lighter or candle and bend it, easy peasy.