ZEFAL Gizmo Universal Mounting System, Black,

Amazon

Universal Bottle Cage mounting System Allows you to attach a bottle cage or other accessories to numerous places on your bike Versatile bracket with adjustable clamps has an integrated soft strap for stable mounting without risk to the paintwork of your frame Replaces the missing mountings on your bike or allows you to create new ones, on the frame, fork, stem, handlebars or seatpost Capable of mounting on tube diameters from 15 to 75 mm

Amazon Marketplace

Perfect for frames without bottle cage mounts or mounting bottles on seat posts Universal mounting: for all diameters from 15 to 75mm Will not scratch the frame Weight: 2 x 18 g Material: thermoplastic resin