【Cup Holder For Large Bottles】 Cup holder extender for car is big enough to hold oversized bottle, works good with yeti, hydroflask, most 20-40oz water bottles. | 【Adjustable Base For Most Cars】 The insert of car cup holder expander is expandable from 2.6"-3.9" to fit different cars, works great in vehicles with cylindrical cup opening. | 【Ultimate Sturdy Design】 Rubber grips inside the cup holder secure bottle tightly, eliminate the noise and movement in driving. | 【Easy to Install】 Just insert the car cup holder extender into car original cup holder, then twist until it is tight. That's all about it. | 【Large Slot For Mugs】 The U shape slot allows mug or bottle with handle to fit in this cup holder. Perfectly for YETI Rambler 10/12oz and other 10-20oz mugs.