These glasses are classy and really well insulated, so that when you hold them they do not transmit the heat from the inside glass compartment to your hand. Very well designed, fit nicely under the nozzle of my DeLonghi ESAM5600 machine, and look fantastic. The only downside is that there is a small hole at the bottom of each glass, I assume as a result of the manufacturing process, that is closed on most of the glasses but is unfortunately open on a few. Because of this hole, when you wash it (either by hand or in the dishwasher) the washing-up water gets in and is really, really hard to remove. You can get most of it out by spending some time tapping it lightly on a surface to force the water out, or by repeatedly tapping the hole with your finger so that the pressure imbalance forces the water out, but the water leaves a film on the internal glass wall and detracts from the beauty of the glass. Still, this does not affect the function of the glass at all, it's purely aesthetic. Apart from that one flaw, these are great glasses.