Color Blue 2LitreMaterial Polyurethane (PU)Sport Skiing, Biking, RunningItem Weight 180 GramsAbout this itemLarge Opening For Ease Cleaning & Filling – Our hydration bladder has one of the largest opening on the market. The big opening makes for easy pouring of water. It is also fairly wide for a hand or bottle brush easily access to the interior hydration bladder. The 4”screw on cap goes on and off easily. For cold water, simply add ice cubes directly from a scoop or refrigerator ice dispenser.