With a name only engineers could love, and made from a proprietary metal alloy called Super Duralumin, these simple but effective cages may need a snappier name than Dura-Cage, but when it comes to holding water bottles, these Minoura cages calmly accomplish the task. The design is simple but smartly executed, and in combination with the 4.5mm tubular alloy, delivers great resiliency and long-term use.