2 in 1 Large Cup Holder, 80oz Auto Water Bottle Holder Bag, Multifunctional Car Hanging Storage Bag for Big Drinks, Items, Vehicle Seat Side Organizer with Mesh Pocket, Car Accessories (Black)

This cup holder really is HUGE. In my photo I have one 32oz Zojirushi thermos and one 24oz Zojirushi thermos in the cup holder at the same time. If I had a 60oz thermos I bet I could easily fit it in there. The top part of the cup holder is attached to the car seat's neckrest with a proper plastic buckle (the strap is very adjustable so you can get the length you want). The bottom is attached with a very elastic strap with a hook in the end, it attaches to pretty much anything underneath seat. I have a feeling this is a pretty cheap elastic strap, so I anticipate the elasticity to break with time and become slacking and unsuable. Time will tell, for now it works fine. The cup holder attaches well and stays in place for the most part. Considering it attaches with very simple straps, you can attach it to pretty much anything, doesn't have to be a car. It can be a stroller, walker, office chair - you name it. For the price (currently $10) I recommend it and feels it's good value for the price.