Unused except for being taken out of the packaging for photography. Tumblers: Approximately φ7.5 x h13.7cm, 350ml x 2 (hollow double-walled structure) Box dimensions: 16.3 x 15 x h8cm Weight: 350g Stainless steel, made in China ● Dishwasher safe × Not microwave safe Due to the hollow double-walled structure, it excels in heat retention and cold insulation. Made of stainless steel, it won't break if dropped, making it ideal for outdoor activities such as camping and barbecues. Compared to regular glass and ceramic products, it is designed to be less prone to condensation. *Condensation cannot be completely prevented; it may occur depending on temperature and humidity conditions. *When hot water is poured in, heat will be felt on the outside to some extent. Please be aware of this.