Universal Car Cup Holder Expander: This cup holder Insert is designed with a adjustable base, which is expandable from 2.56"-3.93" in diameter to fit different car center console cup holder, just twist the top of the adapter to expand or retract the base, ensure the adapter stays securely in your cup holder. You may either rotate clockwise to expand it, or rotate counterclockwise to restore it. Works great for cars, golf-carts, boats, trucks, Sport Machines. Fit Great Majority of Bottles and MugsThis car cup holder expander is big and deep enough for sport bottles and oversized thermoses, such as camelback with 12~50oz, Hydro Flasks with 16~40oz, nalgenes with 12~48 oz, takeya with 18~40 oz, klean kanteen with 16~40 oz, yeti rambler with 12~36oz, yeti mug with 12 and 24oz, yeti tumbler 10~20oz, and so on. Upgraded Material of Cup Holder plug: High Quality ABS material, which resists from grinding, corrosion and high temperature, also it is easy to clean and wash. Moreover the tray attaches with an anti-slip pad, enable to prevent the dust from staying in the box, also it is made of advantaged silicone material, so as to make the whole storage box become more environmental and non-smell. More Flexible Detachable Tray: By contrasted with other cup holder with detachable trays, the upgraded structural design makes this trays 360 rotate and easier to remove. Moreover this cup holder tray has enough space for us to place a series of items and food, such as snacks, burgers, French fries, coffee, mobile phones, wallets, sunglasses, credit cards, keys, coins and so on. Upgraded Material of Cup Holder plug: High Quality ABS material, which resists from grinding, corrosion and high temperature, also it is easy to clean and wash. Moreover the tray attaches with an anti-slip pad, enable to prevent the dust from staying in the box, also it is made of advantaged silicone material, so as to make the whole storage box become more environmental and non-smell.