HSF / AERIA hydration system is designed to seamlessly integrate with the Aeria Ultimate Stem (Stem is required for installation) - combined with the Aeria Ultimate aerobar, this system provides a fully integrated front end "super bike" solution for any bike. This BTA system features the race proven "no splash" fill port, a straw magnet mount for streamlined aero over the top of the system, a bite valve for fluid control and a removable computer mount. - Construction: BPA-Free, Foodsafe HDPE Bottle - Capacity: 30oz (857ml) - Only Compatible With: Profile Design Aeria Ultimate Stem (70mm or 100mm - ONLY) - Weight: 420g