Review on 🚗 SMART KUP Car Cup Holder: Perfect Fit for Hydro Flasks 32 oz and 40 oz, Nalgene 32 oz, and More! Securely Holds Large Bottles up to 3.8 inches Wide. Say Goodbye to Spills with its 3-inch Upper Cup. Get One Unlike the Competitors! (Black) by William Turner

I was looking for something for my 32/40 oz Hydroflask mug that would fit in my car. It was a little loose in my cup holder and when I put my hydroflask in it was a little wobbly. I have a 2010 Toyota Corolla. I found a solution to securely install a cup holder in my car and a hydro bottle in the cup holder. I added 2 small floor protectors that I placed on the outside of the cup holder (1 on each side) and 2 on each side inside the cup holder to secure the hydroflask and ensure a good fit in the cup holder (both on one side) ; If you put it on different sides, the hydroflask will not fit. However, they fit perfectly when he lays them on their side. This is a good product for the price. I'm giving this four stars because you need to find an alternate solution for the cup holder to fit securely in your car and an alternate solution for the hydroflask to fit the cup holder. See photos of a hydro bottle in a drink holder and a small protector. I placed it inside/outside the cup holder to fit my car's cup holder and hydroflask (no rocking).