Double-walled: No risk of burning your fingers with hot drinks - and no condensation forms on the glass surface with cold drinks.Important: Hand washing is recommended. Borosilicate glass: By using high-quality borosilicate glass, the cup will not burst even at high temperatures.It is possible to fill hot water into the ice-cold cup. Hand-blown workmanship: Thanks to the workmanship and experience of the glassblowers, the glass is wonderfully light, clear and smooth for easy and pleasant use. Capacity: The capacity until full to the brim is 350 ml (recommended usage capacity 330 ml).Due to the hand-blown craftsmanship, the capacity of each cup varies from 5% to 10%.A perfect choice for coffee, tea, desserts and more. What you get: Two 350ml double walled glass cups, All glass items are fragile so use and wash carefully.