【Double Wall & Thin Lip Design】- The bottom of the tea mug is designed with double wall for heat insulation and easy hold. The thin lip design makes it more comfortable to drink. It's easier to get your lips on and the tea jumps off the lip better than a thick lip.【Superior Quality】- The tea mug is made of double-wall borosilicate glass, that is thermal shock resistant and allows the glass to resist extreme temperature changes of 180 ℃ (-30℃-150℃). Sturdy and durable enough to be used for years.【Exquisite Infuser】- The lid and infuser of glass tea cup are made of non-toxic ceramic with food-grade gold trim, which is better than stainless steel materials. It will not rust and easy to clean even after prolonged exposure to liquid. And the tea infuser has ultra-fine holes that help brew tea quickly and effectively.【Ideal Gift】- The premium glass tea cup is packed with a nice gift box and EPE pearl cotton interior, that is well protected against breakage. Perfect as a gift for Weddings, Housewarming, Birthdays, Christmas, or Anniversary.【Excellent After-sales Service】 - All products provided by WONDER NEST are entitled to free return and exchange service. If you have any questions, please feel free to contact us and we will do our best to make you 100% satisfied.