Clip on Cup Holder- Clamp on drink holder clips onto any desk table, work bench & more up to 1" thick! Holds your drinks or your phone, pens, and other personal items. Clamp on Cup Holder Quickly clips on many surfaces up to 1" thick Holds many size drinks from small coffees to your large big gulps and everything in-between Easily removes from clamp to be used in your existing cup holders and improve their function Use as a organizer to hold your phone, keys, pens and more Perfect for improving your Cup Holders in your car, truck, RV, tractor. Thats right! It will improve your car holders too! Fits in cup holders 2 3/4" and larger.