About the ASSAM double-walled glasses Bring a touch of elegance to your glass collection with this set of ASSAM double-walled glasses. The perfect blend of practicality and design. These chic, curved glasses fit comfortably in your hand and their double-walled design creates an optical illusion that makes your drink look like it's floating in the glass. Individually hand-blown by skilled artisans, the double-walled glasses consist of two layers of heat-resistant borosilicate glass that keeps hot and cold drinks at their optimum temperature for longer. A sophisticated silicone opening at the foot regulates the outer wall of the glass, which prevents unsightly condensation. So you can also hold hot drinks in your hand without burning your fingers. The stylish double-walled lenses are light as a feather and easy to clean. They come in a variety of sizes and are ideal for serving your favorite drinks, hot or cold. Key Features and Benefits Two-piece set of double-walled glasses. Innovative double-wall construction that keeps hot drinks hot and cold drinks cold. Also perfect for serving soup or cold desserts. Made of hand-blown, heat-resistant borosilicate glass. Hydrophobic silicone valve that balances the air pressure between the two glass walls. Suitable for dishwasher, microwave and oven (up to 176 ºC). Available in different sizes. Use and care Before first use, rinse the glasses in warm soapy water and dry them thoroughly. For all other uses, rinse and dry the glasses by hand or place them in the dishwasher. The ASSAM double-walled glasses can be safely used in the freezer, oven and microwave. Colour: Transparent Material: borosilicate glass Dimensions: LxWxH: 8.6 x 0.086 x 9.9 cm