This Hill adjustable car cup holder expander with phone mount (up to 7-inch phones)

The essentials

If your centre console cupholders can’t cope with your bottle size and your phone mount keeps feeling too loose, this This Hill car cup holder expander is built for that exact annoyance. It combines a phone mount and an adjustable cup holder expander, so you can clamp in both your drink (within the stated range) and your phone without needing to rely on a dash suction mount.

On paper, it’s a clever “two-in-one” idea: the base expands to fit cup openings up to the stated diameter, while the phone section aims to hold your mobile securely using buttons on both sides of the holder. The adjustable height and 360° rotation are the parts you’ll likely notice most during everyday drives.

Key specifications

• Phone compatibility: supports smartphones up to 7 inches
• Supported phones listed include: iPhone 14 Pro Max, 14 Plus, 14, 13, 12, X / XS, 8 Plus, 8, 7 Plus, 7, 6s Plus, Samsung Galaxy S10 / S10e / S9 / S8 and more
• Cup holder expander range: fits bottles/tumblers from 18 to 40 ounces, with a mouth opening diameter under 4.1 inches
• Height adjustment range: 12 to 14.4 inches
• Phone mount rotation: 360°
• Base stability: weighted base with three extensions and anti-slip silicone
• Vehicle fit claims: compatible with most cars, plus SUVs, trucks, also mentioned for golf carts, treadmills and massage recliners
• Phone holder locking method: press buttons on both sides of the phone mount
• Warranty/coverage: 12 months (as stated)

What you’ll notice in use

The biggest day-to-day win is the adjustability. Being able to set the phone at an appropriate height (within the 12 to 14.4 inch range) makes a difference if you use your phone for navigation, calls, or music. A 360° rotation also helps if you prefer portrait for maps or want the screen angled for easier viewing.

For the drinks side, the expander approach is meant to tackle the classic problem of “my bottle won’t fit”. Instead of hoping the cupholder flexes enough, the base uses three extensions and anti-slip silicone to grip and create a more stable triangular structure.

Worth considering if you often carry something larger than a standard can—like a larger bottle—then this layout could feel more practical than a single-purpose phone holder.

Where it shines (and where it may fall short)

Where it makes sense

• If you want one mount to manage both phone placement and a drink at the same time.
• If your current cupholder is the limiting factor, especially with wider or taller containers.
• If you prefer a mount that’s held in the cupholder area rather than on the screen/dash with suction.

Limitations to keep in mind

• Compatibility is based on the size ranges given (phone up to 7 inches, cup opening under 4.1 inches). If your phone is larger than that, or your bottle mouth doesn’t match the diameter requirement, it may not suit.
• The product is described as adjustable in height, but placement still depends on your vehicle’s cupholder area and how the expander sits. In some cars, there can be less room than you expect.
• It’s positioned as a versatile, everyday setup—so if you’re looking for a “mount-on-anything” solution for every situation, you may need to check fit carefully.

After all, the “best” mounting system is the one that stays secure in your specific cupholder—so it’s sensible to measure your cupholder opening and compare it with the stated limits before buying.

Who it’s for (and who should skip it)

It’s a solid pick if you’re the sort of driver who uses your phone regularly and wants the stability of a cupholder-mounted setup, while also needing somewhere for a larger bottle. It also fits well for people who drive different vehicle types, since the description mentions cars, SUVs, trucks, and even non-standard setups like golf carts and massage recliners.

You may want to skip it if your main priority is a simple, minimal mount that doesn’t interact with the cupholder at all, or if your phone/bottle sizes don’t fall within the stated ranges. And if your centre console already gives you a secure phone mount, this may feel like extra complexity for limited extra benefit.

Is it worth it?

This Hill’s adjustable cup holder expander with phone mount looks worth considering when your cupholder is doing the frustrating part—either it won’t hold your drink properly or it limits your phone placement. The combination of a weighted, anti-slip base, adjustable height (12 to 14.4 inches), and 360° rotation is a practical blend for everyday driving.

It might not be the best choice if your phone or your bottle opening doesn’t match the stated compatibility ranges, or if your vehicle’s cupholder space is tight enough that the expander can’t sit comfortably. If you like the idea of managing both phone and drink from the same spot, and you’re happy to check fit before install, it’s the kind of add-on that can genuinely reduce niggles on every journey.

Quick questions before you buy

What size phones does it fit?

It’s described as supporting smartphones up to 7 inches, with a list of compatible models including various iPhones and Samsung Galaxy devices.

Will it hold my bottle or tumbler?

It’s designed for bottles/tumblers between 18 and 40 ounces, provided the mouth opening diameter is under 4.1 inches.

Can I adjust the phone angle?

Yes. The phone mount includes 360° rotation, plus an adjustable height neck.

Is it secure in warm weather?

The description suggests it’s designed to stay from slipping compared with some “gooseneck” styles when exposed to heat, but no extra test results are provided—so it’s still wise to ensure it’s seated correctly in your cupholder.