Spill-proof when open and pushes closed for leak-proof transport, the Surge valve maximizes flow rate and self-seals to eliminate spills and splatter 100% BPA-free bike water bottle features a sleek, single-wall design that is light, durable and compact Fits securely in a variety of bottle cages Has a unique grip groove and wall design for effortless hydration Twist, pull and washù dishwasher safe two-piece Surge cap is easy to clean Materials include low-density polyethylene (LDPE) and thermoplastic polyurethane (TPU) valve. BOTTLE WAVE WHITE 20