Excelity&reg; Set of 2 Double Wall Thermo Glasses for Beer Tea Coffee Milk-10oz/300ml Set of 2 10-ounce double wall glasses. Made of lead-free high quality borosilicate glass. Designed for your everyday use, sturdy and durable Air insulated in the unique double wall structure keeps cold drinks cold and hot drinks hot, The outside surface always feels comfortable in hand This high quality glass is perfect to use in the home or office