Heat resistant double wall cup insulation keeps tea or coffee hot. Also good for cold drinks. Temperature resistance (from -20degreeC to 180degreeC).High quality borosilicate glassware can tolerate the thermal shock. Liquid shimmers as it is suspended in mid-air. Heart shape design is not apparent until tea starts brewing Love with every sip! These delightful cups will make you smile each time you fill them up, full transparent glass material, with meticulous manual technology, so that the teacup always inadvertently reveal the glory of the people. Double wall insulation keeps tea or coffee hot while eliminating the need for saucer or coaster. To get the exact product that you have expected and protect your right when you purchase the product, please Choose our 1CHASE branded products.