Tacx Deva Bottle Cage BlackFeaturing a unique cylindrical shape that ensures perfect clamping, the Deva bottle cage has proven its worth many times over during cycling classics over cobblestones. Insert your bottle easily, and have confidence that the cage will keep it firmly in place. Deva has a core made of polyamide reinforced by carbon for better clamping and reduced weight (32g), surrounded by a colourful shell made with glass fibre compound.