[cup holder expander for car]: The diameter of the expandable base can be adjusted from 2.6-3.6 inches to fit different kinds of car cupholders. Simply twist the base of the adapter to expand or shrink the base, which can be firmly fixed to the cars cup holder. [Removable Silicone Elastics]: The silicone elastics of the car cup holder insert make it easy to put in and take out the cup from the adapter. Make sure the cup is fixed on the cupholder when you are driving and will not shake or fall off to avoid bottle rubbing. It can be easily removed in case you dont need the silicone pop tabs. [car cup holder expander plus cell phone organizer]: There is a cell phone organizer on the side of the car cup holder, which allows you to put your cell phone in and access it whenever you want. Avoid sometimes not being able to find your phone or dropping it into the seat crevice. The small hole at the bottom of the phone organizer is convenient for charging use. [Adjustable base for more stability]: The cup holder base insert diameter can be expanded from 2.6 inches - 3.6 inches (about 6.6 cm - 8.5 cm) to fit most cars, golf carts, boats and trucks. After upgrading, the extended cupholder base fits better in the car cupholder slot, stable and solid, not easy to shake. [Quality Assurance Service]The upper bracket comes with reinforced thick fence, making it more durable. If the double car cup holder has quality problems or damaged in transit, please contact us in time, we will solve the problem for you as soon as possible.