The Aero TT System offers 50% less drag than round bottles, saving up to one minute in an Ironman and up to 20 seconds off of a 40km TT/Tri. 20oz, BPA-free water bottle with easy grip texture and groove. Bottle is held securely by the Hi-Grip XLAB Carbon Cage. Total System Weight: 121g. Item Specifications: Color: Black, Bottle Type: Standard, Access Style: Top, Mount Type: Bolt-On, Material: Carbon, Defined Color: Black,