AIEVE Protective Silicone Boot for Stanley Quencher Adventure 40oz & Stanley IceFlow 20oz 30oz, Water Bottle Bottom Sleeve Cover Compatible with Stanley Tumbler, BPA-Free

Good quality, very easy to put on (the tiny air hole really does make a difference). It fits tightly without being ridiculously/inconveniently tight. Most impotently, it still fits in my cup holder. I think this is one of the thinner boots I’ve seen. I’ve seen other ones that friends have ordered for their own Stanley & they’re much thicker. So I appreciate how thin this one is without sacrificing protection. Now I don’t have to worry about scratching the bottom of my Stanley in my cup holder/rough surfaces & it’s a lot more quiet when I place it back down on my desk. My only regret is that I didn’t buy this & place it on my Matte 40oz Stanley Quencher when I first bought it because the matte coating is already starting to peel on the bottom. Maybe I’ll older another Matte Stanley & place this one from the start to see if that makes a difference!

Love this silicone cover for my Stanley. I bought this because the color on my Stanley cup was getting scratched from being placed in my car cup holder, now the cup still fits but is protected from getting more scratches. The cup fits more snugly in the cup holder now, requiring a bit more muscle to lift the cup to drive but fits just great in the cup holder so it doesn’t bother me

Love this. I actually bought 2. I put them on my Stanley 40oz tumblers. I love them not only for protection purposes so the bottom of the cup does not get scratched when setting them places. Also, they make the cup stay in one place rather than be able to slide around. I have the black and the clear color. Both match the Stanley cup colors perfectly.

I must say, I'm thoroughly impressed! This silicone water bottle bottom sleeve has truly exceeded my expectations in every aspect.The quality of the silicone material is outstanding. It's thick, durable, and provides excellent protection for my tumbler. I no longer have to worry about accidental bumps or drops damaging the bottom of my Stanley. The silicone boot doesn't interfere with the functionality of my tumbler in any way either. I can still easily access the lid, pour my favorite beverages, and clean the tumbler without any hassle.Highly recommend!

I am obsessed with my Stanley tumbler, but we have a glass table, and I was terrified that I would break the table with my cup. This has eased my anxiety! It helps keep my cup from sliding around on uneven surfaces, and also serves as a great built in coaster for wooden tables. I love it so much, that I gave one to my best friend for her cup - and she loves it as well!It fits very snuggly to the bottom of the cup and still easily slides in and out of my car cupholders.