Keep the Funk Out of Hydration/CamelBak Bladders
Even if the only thing you’ve had in your CamelBak or hydration system bladder is water it can still get a little funky. Empty it and store in the freezer to prevent weird tastes and funk from growing.
Even with only a bit of leftover water in it, when a bladder sits in the closet half-empty for weeks at a time the weird tastes from water fountains and backcountry water can seep into it. When things are frozen nothing can grow or seep into the bladder material.