Made from neoprene — the same stuff used in making undersea diving suits, and an ideal material for preserving an object’s temperature. Bottles are kept warm or cold for up to four hours in these totes, which are built with highly durable nylon stitching.
I like these totes, and use them regularly. Number one, I like [...]

This can be called a wine chiller or if you want to be really geeky, a “wine temperature optimizer”, since it does both chill down or warm up a wine, depending on the bottle’s temperature.
It’s noisy as hell but it works as advertised. No wine snob should be without it.