The small TWIST bottle 450 with an optimized easy squeeze thanks to a softer material and new bottle cap with a high flow, self-sealing and leak-proof valve and optional dirt cover. Kids bike or fully - paired with the innovative magnetic-mechanical mounting system there is no frame too small for this bottle. Includes the TWIST uni base for attachment to any tube with re-closable zip ties. - 450 ml / 15.22 fl oz - Always BPA-Free & BPS-Free - Leak-proof, self-sealing bottle cap with high-flow valve - Includes removable dust cap - Includes removable connector - Includes TWIST Universal Bike Base for attaching to any tube - Compatible with all TWIST Bases - Bottle is dishwasher-safe without Connector - Proposition 65 Approved