Superlight Carbon Bottle Cage When we designed this cage, we tried all different kinds of shapes and we lost bottles in the process, including the odd one or two thrown in frustration. But that just pushed us to come up with something better. The result of our design and testing is the Zenith bottle cage. Sure, this is a nice looking carbon cage, but it also holds your bottle tight enough so that it won’t fall out while the shape makes getting your bottle in and out really easy.