Upgraded Extendable Cup Holder: Bring convenience, strength, and pleasure, enjoy fast food or coffee in your car without worry. It does not affect adjacent cup holders, shifters, center console cover, and car dashboard. All bracket supports for the cup holder for car are in the same plane, ensuring stability and strength, so the cup won't shake while the car is moving.

Increase Your Cup Holder's Capacity:Adjustable Diameter from 2.56 to 5.51 inches suitable for most bottles, drinks, coffee mugs, instant noodles, snacks, and fast food cups. This cup holder expander will hold them firmly, with no risk of shaking or tipping

Expandable Base For 2.5" to 3.9" Car Cup Holder:The car cup holder expander fits most cylindrical car cup holders. The adjustable base has an expandable diameter from 2.5" to 3.9" to keep the base firmly in place. It also compatible with Tesla series, RVs, trucks, boats, SUVs, treadmills, ship, golf carts, sectional couch etc.

Easy to Use and Install:1. Put the base in the car cup holder, and tighten the base knob to make sure the base is firm. 2. Insert the cup holder into the upper part of the base, making sure it is fully inserted. Turn the knob to adjust the size you need for the cup holder expander. 3. You can also separate them, just pull them out