The 40 oz. vinyl-coated Stainless Steel Quick Cage is specifically designed to hold large reusable bottles. Holds bottles from 32 oz. to 40 oz. sizes, including single-walled or insulated stainless steel bottles, or plastic bottles, made by manufacturers like Klean Kanteen, Hydro Flask, and Nalgene. The cage securely mounts with two brackets to handle the extra weight and vibration of the larger bottles, without damaging your frame.