Quote Originally Posted by FreshNewbie
Anyway, how do you preffer to fill your hydrapack? do you feel it with plain water and put energy drink in the bottle or visa versa?
Check what the manufacturer says, but usually the recommendation is only water in hydration bladders. The creep crawlies grow in there, even with water only. Storing the hose in the freezer between times helps. People have all sorts of ways to clean the hoses. We use a bit of bleach solution and then rinse, rinse, rinse.