When Zipp sets to the task of engineering a product for a specific mission, what results is product without peer. In this case, even the humble water bottle cage has been scrutinized and re-engineered to the point of perfection. The Zipp VUKA BTA Water Bottle Cage is compatible with Zipp's VUKA family of aerobars, of course, but also nearly any other aerobar water bottle mount configuration on the market. The cage can also be installed on standard down tube and seat tube bottle mounts, so it can pull duty on your road or even your mountain bike, too. And, coming in at 28 grams, it's one of the lightest out there.