AIERSA 2Pcs Silicone Boot Sleeve for Stanley Quencher 40 oz 30 oz Tumbler with Handle & for IceFlow 20oz 30oz, Protective Water Bottle Cup Bottom Bumper Cover for Stanley Tumbler Accessories, Black

These products are easy to use and place on the bottom of Stanley cups to prevent marking and sliding. The color goes with anything. The size makes it fit snugly. Easy to hold and very functional. They seem sturdy, well built and durable.

Why did you pick this product vs others?:Very affordable and great at protecting my 30 oz Stanley cup

Perfect fit for my Stanley Quick Flip GO 24oz and the colors are beautiful. Great quality

This boot fits my stanley iceflow 30 oz cup. I bought them in wisteria & clear it was the closest I could get to my cup color. The price wasn't bad.

Excellent item and it was exactly what I wanted. Look at before and after pictures.

I like having a bumper on my metal cups because of the noise when I set them down. These did the trick perfectly.Pros:1. they fit snug on two types of cups. One was from a restaurant and 32oz. The other is an RTic 30oz.2. They are easy to slide on and off for cleaning. I just wash them in warm water with my cups and set them on the drying rack.3. They were inexpensive but still good quality and feel like they are going to hold up.Cons:1. They need a little hole in the bottom or something to help get the air out.Either way, I'm ordering more in different colors. So much better than other brands I have purchased.

Fits perfectly on my Yeti 26 oz cup and Hydro Flask 40 oz tumbler. They are very snug and stay on even after several washes and daily use—no more screeching on granite countertops. The only problem is that it makes the bottom thicker, obviously, which means it fits too snugly in my 2009 Toyota Carolla cup holder. I just put a pen in the cup holder, and it sits on top of the pen, so it doesn't get stuck in the cup holder now.

I have two different size water containers, and they both fit perfectly!