Description : Material type: High borosilicate glass, not easy to be broken, safe. Double glazing design : Heat insulation, let drink more elegant, more chic. Stunning : Liquid glows as it is suspended in mid-air. Heat resistant: Withstanding temperature differentia 20 to 150 degrees Celsius. Perfectly safe for ice drink and hot espresso coffee or tea. Heat preservation: 2-layer design insure that their contents remain hot for longer while the glass itself remains only warm to touching. It also prevents condensation. Notes: Due to the difference between different monitors, the picture may not reflect the actual color of the product. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. Specifications : Name: heart-shaped glass cup Material: high borosilicate heat-resistant glass Color: transparent Withstand temperature: -20 to 150 degrees Celsius instantaneous temperature difference Capacity: 240Ml or 8 oz, 180ML or 6 oz Size (cup mouthxheight): 240ml- 9x9cm or 3.54x3.54in, 180ml-6x7cm or 2.36x2.75in Feature : Lightweight and heat resistance: Borosilicate glass is a type of glass with silica and boron oxide. Very low coefficient of thermals expansion, resistant to thermals shock. Borosilicate glass is less dense than ordinary glass. That makes it lighter in weight. A small spot on the bottom of cup: For the safety of users, it's not vaccum between the 2 layer of mug. To prevent glass pieces blow up and do damage to human when break, our new design mug leave air inside. Don't scrub the sealed air hole strongly in washing. Maintenance : A. We don't suggest dishwasher, please consider hand washing in flowing water. B. Avoid microwave or oven, because of the air inside as mentioned above. includes: 1 x heart-shaped glass cup Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.