Excellent. The basic one without leaks and keeps the cold and ice cubes intact and the hot ones for several hours without freezing your drink. Another positive thing it has is that there is a non-slip rubber at the bottom of the cup that does not slip.

I don't know if I just happened to get a defective piece, but I managed to use it only once and the lid doesn't screw on properly the second time. I don't know if it got crooked because of the hot drink, but there is still no excuse.

It was purchased with the purpose of keeping coffee warm in the office during the morning hours. After a week of use, I would say that the beverage stays warm for about 3 hours, after which it cools down quite a bit and becomes cold. It is of good quality construction and has a size similar to a coffee cup, slightly taller of course because of the lid. It is definitely worth the money for the price it was purchased, but if someone wants to keep their drink warm for a longer time, they should look for more expensive options.

Update 05/01/2022: A few days ago, I decided to take it in the car and I was surprised to find that it barely touches the bottom of the cup holder. It does attach, but the bottom does not touch the bottom of the cup holder by about 1 centimeter. It might fit well in other types of cars, for example, SUVs (mine is a compact one). Its slightly conical design saved the situation and it fits.