The Elite is a revolutionary reversible bladder. The design of the Elite allows users to easily maintain cleanliness. The patented wide slide top opening allows for fast filling and secure seal. To clean, simply slide open, reach in, reverse, and rinse. This product is made by Hydrapak LLC for USWE Sports AB Specifications:Total capacity: 2,0 litreMaterial: TPU (thermoplastic polyurethane)Including: 45 degree bite valve, drink tube, Plug-N-Play connector, and reusable bladderReversible for easy cleaning and dryingConstructed with 0.25 mm thick TPU (thermoplastic polyurethane) for superior durability and flexibilityPatented wide slider opening for quick filling and leak proof sealRF welded seams to create superior bonds at a molecular levelFiltration Compatible (with Plug-N-Play connector) links with in-line water filtration optionsBPA FreePVC FreeDishwasher SafeFDA and EU Approved materialsNaturally Anti-fungalNo-Leak Product Warranty