Hold cup/bottle-water and phone at the same time 
Insert is expandable from 6.85cm/ 2.70in to 10cm/ 3.94in in diameter to fit many different automotive cupholders. 
Also works great for treadmill, golf-carts, motorcycles, cruise, truck, and RV.
Adapter works best with bottles/cups below 3.54" in diameter and fits most 32 oz. - 40 oz. water bottles.
1" slot in side of expander allows cups or travel coffee mugs with handles to fit into the adapter.
Easy to add or remove from cup holder- just twist the top of the adapter to expand or retract the base.
This car cup holder built with solid and thick plastic and the rubber tabs around the top of the cup holder- hold the cup firmly in place without tipping or spilling when driving down the road.
Features:
Fit diameter 2.7"- 3.94" console cup holders
Fit most brands bottles below 3.54" diameter
Stop the larger ones from spilling
Keeps the water bottles in place