Protect your favorite Stanley (or other) tumbler from dings, scratches, and loud clunks with these handy silicone boots! This pack comes with two boots (clear and rose red) made from food-grade, BPA-free silicone. They stretch to fit the bottom of a ton of popular bottles – specifically the Stanley 40oz Adventure Quencher with handle, the 30oz & 20oz Adventure Quenchers, and the 30oz & 20oz IceFlow tumblers. But they’re also flexible enough to work with lots of other 12oz to 40oz bottles with a bottom width around 2.83 to 3 inches. Just slip the boot on – no water or hassle needed. It gives a nice non-slip grip, reduces noise when you set it down, and adds a cushion against drops and dents. Easy to clean, reusable, and you can fold or roll it for storage. Perfect for keeping your bottle looking newer, longer. Great for the car, office, gym, hiking, or just daily use. A simple, affordable accessory that makes a big difference.