BKBY Chameleon Silicone Water Bottle Boot, Compatible with Stanley & Hydro Flask Tumbler 2.8-2.95in Bottom Anti-Slip Protector Rubber Sleeve

So far so good, for Thermoflask 24oz bottle, lost the original bottom cover and this replacement fits perfectly. Definitely a very snug fit and a little hard to get on, but that's not a bad thing. Good price, quality, design, and functional.

It’s probably the closest match to my Black Cherry Owala that I’ve been able to find on Amazon! It’s ever so slightly darker than the top cap portion but barely noticeable and the green blue shimmer is a nice touch! It’s thick and fits well on my 40oz sway

Perfect match for my 40oz Quencher ProTour Flip Straw Tumbler in the color Espresso Gold. Fits well, does not fall off and is a really close color match.

This was great and just the color I wanted to go with my Holly Stanley 20 oz. It has a slight gold undertone, which worked with the cup I was pairing. It fit well.

Edited response: This company had a wonderful response with positive customer service. They stated that the cup sleeve should return to its original state with time. Though the packaging method is still frustrating, I greatly appreciate their effort to reach out and compensate for what felt like a ruined product. We’ll just have to wait and see if the crease goes away more 😊 it’s already a little less than when it arrived. Old Review: Pretty colored silicone, and functional? Sure. However, it came vacuum sealed and the creases look horrible, despite a dark color like another review noted. It does fit my 30oz Stanley cup, and would fit a 40oz one like everyone gets. Because of the crease that won’t go away, I’d say it lacked value for the cost. I’d pay a couple bucks for this as a “malformed product” in a bin that they don’t sell at normal price, but this is ridiculous. I have no idea how to fix this ugly crease.

I ordered wrong color but still works for my other Stanley

These are delivered shrink wrapped and flat so the creases are permanent. The fit is terrible; upper is tight enough to keep it on the cup, but then it’s too big everywhere else, as you can see it bows out. The color was pretty, but that’s all I’ve got.

I bought the "Glossy Cherry Mocha" to protect my 40oz RTIC and it fits well. If you are buying this for the same tumbler, just know that the fit is a bit tight, but it isn't impossible to put. It didn't came creased, and the color is as shown in the promo photos. It looks durable, so I'm sure it will do it's intended job.