Zwilling 355ml Glass Cup Double-Walled Glasses for Home Use, Heat-Resistant（set of 2）

Holds heat when hot drinks are cold. Ability to refrigerate cold drinks for extended periods of time. Bowls or glasses for ice cream, fruit salads, soups and apizers. Mouth-blown by skilled artisans. It is a high quality glass. It is borosilicate glass. (Borosilicate glass) or hard glass because 1. it is 3 times harder and more impact resistant than soft glass, and 1. heat resistant. Made in Germany. Italian Design Microwave and dishwasher safe.