The hydrapak full force reservoir 2l power hydration at its best the full force 2l reservoir is a pressure activated hydration system equipped with an easy to use squeeze bulb that sprays water at your command whether you39re dousing yourself cleaning your gear or hydrating your dog of course like all hydrapak reservoirs it39s fast filling leak proof and fully reversible for easy cleaning hydrapak full force reservoir 2l features multi use hydranttrade tube includes a