The exclusive bottle/bottle cage coupling system, developed ad hoc, safely and securely holds the bottle even at high speed, a common occurrence in time trials. The test conducted in a wind tunnel in the designing and development phase optimised all surfaces in order to obtain an unprecedented aerodynamic result. Ergonomic drinking system for competition use. The diameter of bottle and holder is 66 mm. Complies with UCI regulations. Material holder: Carbon composite material. Material bottle: plastic. Closure: Snap lock with diaphragm valve. Aerodynamic, compact and ultralight bottle holder kit