3V Gear Commander 2L Hydro Tank - Hydration Reservoir - Compatible with Camelbak and Other Hydration Packs 2.0 Liter; Metallocene PE high strength & taste free film (BPA, Latex & PVC free) Tough construction for maximum abrasion resistance Easy-to-use 3/4 turn 80mm (3.15") Wide-Mouth Fill Port Fill port handle for ease of fill; Bite valve retainer Anti-microbial bladder interior and drink tube to prevent bacteria and mold