Car Cup Holder Expander with 8" Tray & Adjustable Base

Upgrade Your Car's Cup Holder with Room for Big Bottles & More

Tired of your oversized tumbler or wide water bottle not fitting in your car's cup holder? The Car Cup Holder Expander Adapter solves that problem instantly. With an offset adjustable base, a spacious 8-inch detachable tray, and 360° rotating arm, this clever accessory transforms your standard vehicle cup holder into a fully functional drink and storage station — perfect for large insulated cups, wide-mouth bottles, and everyday essentials.

Made in Mainland China.

Key Features

• Fits Large Bottles & Wide Cups: Accommodates oversized insulated tumblers and most popular bottle brands with diameters between 3.4" and 3.8" — so your favorite large cup always has a secure place to sit.
• Detachable 8" Tray: The included 8-inch tray provides a convenient platform to hold your phone, tissue box, snacks, or other small items. A built-in non-slip mat keeps everything stable while you drive.
• 360° Adjustable Mechanical Arm: The tray arm moves up, down, forward, and backward — and rotates a full 360 degrees — so you can position it exactly where you need it for easy access.
• Extendable Base: The bottom base expands to approximately 100mm in diameter, making it compatible with vehicles that have larger factory cup holders. No tools needed for installation.
• Universal Compatibility: Designed to work with a wide range of cars, trucks, and SUVs. Ideal for use with popular large-format cups and insulated tumblers.

Specifications

• Tray Size: 8 inches
• Cup Diameter Range: 3.4" – 3.8"
• Max Base Diameter: ~100mm (adjustable)
• Arm Movement: Up/down, forward/backward, 360° rotation
• Tray Surface: Non-slip mat included
• Country of Origin: Mainland China

Why You'll Love It

Whether you commute daily, take long road trips, or just like keeping your car organized, this cup holder expander is the upgrade your vehicle has been waiting for. Stop struggling to wedge your tumbler into a too-small slot — just drop it in, adjust the tray to your liking, and hit the road with everything you need within easy reach.

For more information on safe driving practices and reducing distractions in the car, visit the CDC Transportation Safety resource.

Frequently Asked Questions

Q: Will this car cup holder expander fit my vehicle's existing cup holder?

A: Yes — the extendable base adjusts up to approximately 100mm in diameter, making it compatible with a wide variety of standard and larger factory cup holders found in most cars, trucks, and SUVs. No tools are required for installation.

Q: Can I use the 8" tray without the cup holder function?

A: The tray is detachable and attaches via the adjustable mechanical arm, which requires the base to be secured in a cup holder. However, the arm can be fully rotated and repositioned so the tray can function as a standalone side tray for your phone, snacks, or other items while the base holds your large beverage cup in place.

Q: What size cups and bottles does this cup holder expander accommodate?

A: The cup holder expander fits bottles and insulated tumblers with outer diameters between 3.4 and 3.8 inches. This includes many popular oversized insulated cups and wide-mouth bottles commonly used for travel and daily hydration.

Q: Is the tray surface grippy enough to hold my phone while driving?

A: Yes — the tray comes with a built-in non-slip mat designed to keep items like smartphones, tissue boxes, and small snacks stable and in place, even on bumpy roads.