About this latte macchiato glass from the Leonardo Senso coffee line is thoughtful. The glasses are designed to be easily stackable and also look nice. The bottom of the glass is made of tempered glass that allows pouring directly from the kettle or Quooker, without the risk of breaking or cracking the glass. The glasses are microwave and dishwasher safe, there are even 3 slots in the bottom so that no water stays in them when you unload the dishwasher.