The tacx deva bottle cage is a unique and properly optimised water bottle cage doing it39s job so well that it39s the official cage of multiple professional teams with a cylindrical shape the tacx deva considerably reduces the chance of the bottle working its way out of the cage and falling a key and often underlooked feature due to its prevention of dangerous situations occuring while you39re really going at it your bottle will hold true with the cages optimal clamping performing