Adjustable Size Design. The cup holder can fit larger, standard and smaller size water bottles. Fit max bottle diameter is 90mm, the min bottle diameter is 50mm. Flexible to accommodate various sizes of water bottles, coffee mugs, baby bottles, drink bottles, drink cups, and more. Loosen the bottom knob to quickly adjust size and tighten to lock. The special surrounding structure of the bicycle water bottle holder will hold the bottles tightly, so there is no need to worry about it falling while riding. This bicycle drink holder can be installed on the horizontal or vertical handlebars or bike frame, the installation direction can be adjusted. This motorcycle drink cage can be installed on the handlebars and bull bars. The bicycle drink cage also can fit anywhere on your bike: handlebar, frame(down tube, seat tube, top tube, fork), and also for scooter, e-bike, , atv, utv, wheelchair, baby stroller, pushchair, more. Colour:Black Material:nylon Package Contents: 1 * Motorcycle Cup Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.