Fits any size for your need Rollator cup holders are designed with flexible flaps which could adapt to any size of water cup to remain upright Open sides accommodate bottles with handles such as a baby bottle with a handle a cup with a handle etc Universal cup holder Multifunctional cup holder could be used for Rollator wheelchair mobility scooter armrest kid bicycle airport chair office chair lawnmower stroller etc Put different sizes of bottles like water bottles coffee mugs baby bottles etc Easy installation Flexible clamps with rubber pad allow 360 degrees as well Could be installed on different styles of rollators The clip of the walker cup holder is suitable for the pushchair rod of 2035 mm diameter and firmly clamps on the wheelchair rod to avoid sliding easily Safe and steady The wheelchair drink holder is made of safe materials The ABS plastics and slipresistant rubber ensure that cups can keep steady in the cup holder even on the rough road However it is not recommended to use it on sports equipment with strong vibration such as motorcycles Guarantee service 6month Guarantee service so you can purchase now with confidence And If you have any questions about our product please free to contact us