The small Twist bottle 450 has an optimized easy squeeze thanks to a softer material. The bottle cap has a high-flow valve that is self-sealing leak-proof and comes with an optional dirt cover so the mouthpiece stays clean out on the trail. This bottle can fit on any bike - big or small and is paired with a magnetic mounting system. Includes the Twist bike base for mounting to the standard braze-ons.Rounded ergonomic designImproved squeezabilityLeak-proof self-sealing bottle cap with a high - water flow valve and optional dirt coverDishwasher-safe