PREMIUM MATERIAL - Made with high quality borosilicate glass, strong and sturdy, can withstand temperature from -10 ~ 160°C STAINLESS STEEL INFUSER - Stainless steel lid with edges wrapped in heat resistant silicone to give your tea mug a nice seal to maintain the ideal steeping temperature. this silicone band prevents chipping the rim, and keeps the edges cool for easy removal after brewing! EASY TO CARRY AND WASH - The tea cup holds 13.5 oz, Perfect size for carry when work in office, home uses or travel . The glass mug is comprised of three detachable pieces, can be disassembled and cleaned easily. Dishwasher safe but recommend to wash it by hand. please clean and dry the filter with sponge or soft cloth to keep stainless steel clean and sanitary. FOR TEA LOVERS - If you are a fan of tea, then, probably, the drink from the sachets will not satisfy you. Do you want to enjoy the most delicious and flavorous freshly brewed tea at home or at work? Use our tea cup with lid to brew a large portion of the drink per person (capacity - 13.5oz / 400ml). SATISFACTION GUARANTEE - Please feel free to contact us if you have any concern.To ensure product quality, please make sure buy from Tomotime, We will offer a free replacement or refund if anything goes wrong.