Discover the TWIST Bottle 450 kids + uni base: Perfect for pint-sized pedal enthusiasts with compact bikes that play hard-to-get with traditional bottle mounts! Why? Because this little powerhouse, armed with a magnetic-mechanical mounting system, plays nice even with the tiniest frames. And guess what? It comes with the TWIST Uni Base, a universal attachment wizard, ready to marry your bottle to any tube that's re-closable! - 450 ml / 15.22 fl oz - Always BPA-Free & BPS-Free - Perfect for kids bikes - 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