The Ultimate Direction Body Bottle 500 II soft hydration flask is now made in taste-free PEEVA material. No longer will your water taste like plastic! PEVA is considered to be a healthier alternative to PVC products since it is a non-chlorinated vinyl material. This updated flask is redesigned with a new ergonomic shape for more comfort at your shoulder. The Body Bottle is the easiest and lightest way to carry your fluids. Fits any UD Vest, Vesta, waistbelt or Clutch. Collapses fully to a tiny size when empty. Soft Silicone push/pull bite valve is easy to operate on the fly. Smaller and lighter cap, which fits all new Ultimate Direction bottles. WEIGHT 35 g / 1.23 oz. FLUID 500 ml / 16.9 oz. MATERIALS Polyethylene Vinyl Acetate (BPA-Free).