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 Johnny Black

Product does not fit snugly in car cup holder. I understand that car cup holder sizes vary from car to car, so they should make some sort of adjustable size to accommodate that. The same goes for the top, which will accommodate the larger bottle. Again, bottles vary from size to size, so this needs to be adjusted as well. Without additional padding, my large bottle in the Smart Kup tends and wobbles because it's not deep enough to be stable. I had to add a felt pad to take up the sag otherwise it looked like the bottle would tip over on turns. For the price, it should be adjustable, otherwise it's too expensive for a piece of hard plastic.