I bought and used these espresso mugs for almost a year. They are ok, in particular i can hold them without burning my fingers and, being insulated, they hold the heat longer. However, for reasons unknown one of the two leaked coffee between the layers. It is not broken, the liquid does not come out, i tried, see pictures. Does anybody have an idea what happened?

These cups are nice looking and keep beverages at the desired temperature. My only criticism is the silly and hard to miss "JoyJolt" logo on the bottom which, in my opinion, makes them inappropriate as a gift. It seems that Chinese companies have a difficult time making up names for their products. e.g. "TeeHee" is the brand of some otherwise excellent socks that I bought from Amazon.

J'ai échappé une des tasses sur mon comptoir de cuisine et elle a volé en éclats. Peu résistante Non recommandé

Loved these they are a perfect size and shape. After washing them I barely tapped another cup against it and it broke. You have to be very careful with them. Other then that they are nice little cups.

Same as their other sizes: because of how the weight is distributed towards the handle, the cup easily tips over when there's nothing inside. So I guess it is statistically more likely to fall, thus less durable. And it makes handling and storage a bit of an unease.

Lightweight, fits nicely to the lips and feels good in the hand. I was surprised that the size of the two cups is slightly, but noticeably, different. When side-by-side, one cup is about 3/16" shorter and the inner wall is much closer to the base. Makes me wonder how they're made. Not a big deal, but minus one star.

Cost was good as well as the product

It’s a good product. A little smaller than I expected.

The feeling is like you have a plastic cup, but it is actually glass. The double wall is very good. My only comment is about the material that it does’t fell like glass, although it is glass....

We love the cups, but one of them wobbles when it's on a flat surface. It looks like a bubble in the glass.