Made with borosilicate glass, the Artless Goods double wall glass is suitable for both hot and cold drinks. Strong, sturdy and durable. An elegant and classic piece, the double-walled glass looks great with any beverage. It prevents condensation for cold drinks, as well as maintain an easy hold while containing warm brews. Due to the encapsulated layer of air in between the glass walls, your hot beverage stays hot longer while your cold drink stays cold. The large 400ml glass is great for every day use. Dimension: Ø9cm x 13cm Dishwasher Safe and Microwave Safe.