About the Leonardo Senso coffee line has been thought through. The glasses are beautiful to look at and also a functional addition to your Tableware. The glasses are easily stackable and the bottom of the glass is made of tempered glass which allows pouring directly from the kettle or Quooker, without the risk of breaking or cracking the glass. After use, the glasses can be cleaned in the dishwasher, there are even 3 slots in the bottom so that no water remains in them when you unload the dishwasher.