Car Cup Holder Expander Adapter, Adjustable 3 in 1 Cup Holder Expander with Phone Holder & Card Organizer, Fits Less Than 4.1'' Bottles for 2.56''-3.94'' Cup Holder, Car Accessories

It drives me crazy that cup holders are never quite large enough to hold the "thermos-style" cups I bring from home. That means you're either balancing them in your lap, putting them on the floor where they invariably tip over, or setting them in a cup holder that's not *quite* big enough, meaning if you hit the brakes too hard the cup goes flying.This cup holder solves that problem. The bottom adjusts to fit your current cup holder, and the top portion is bigger so larger cups can fit inside.The adjustment is a bit difficult because you have to figure out how big your cup holder is, get it just right, and then shove it in. You don't want it to be too lose or the whole thing will be top-heavy and tip over.The cup holder does adjust from side to side if you want to move it to one side to accommodate another cup holder or something on your center console.It also has a convenient phone holder with a slot for cash, credit cards, gift cards, etc.All-in-all, this is a great solution to the problem of cups that don't fit.

This cup holder is well made and the phone holder attached easily to the side. The phone holder has a spring loaded side so it holds thinner phones stable.Like other oversized cup holders, there's a dial at the base that enlarges the base so that it can accommodate cup holders of any soze. Unlike other oversized cup holders however, this one can't be easily adjusted while it's sitting in the car cup holder. That means you have to adjust it then push it into the car cup holder...there's no easy way to tighten it up after you install it.