Premium Quality Material: This minimalist style tea cup is made of food-grade borosilicate glass that is lightweight, lead-free and BPA-free, with good heat resistance and can withstand sudden temperature changes from -4°F to 300°F. It will be safe enough when boiling water is poured into the tea cups.Mircowave Safe, Freezer Safe, Oven Safe, Dishwasher Safe and Durable. The loose leaf tea steeper measures approximately 9.5cm(3.7inch) in diameter, 12cm(4.7inch) in height,500ML(17OZ）large capacity. Large Capacity Mushroom Glass Mugs: The transparent glass strainer effectively filters 99% of the tea leaves. This glass teacup is usually used for steeping and filtering floral tea, , rose tea, chrysanthemum tea, black tea, green tea and so on. The filter is easily removable for rinsing and cleaning. The handle of the glass teacup is ergonomically designed for easy gripping and a comfortable grip. Teacups with handles can effectively prevent hot tea from scalding. Perfect Gift: You can use the tea cup with strainer and lid in various occasions, such as home, office, treats, housewarming party, etc. Our 17 oz glass teacups with infuser and lids are your gift choice for your friends and family, can be used as Birthday gift, Christmas gift, Valentine's Day gift, Graduation gift and so on. After-sales Service: We guarantee to provide high quality products and best service, but there are many facts or reasons beyond our control, such as shipping, packaging or other misbehavior. If you receive broken tea infuser, please feel free to contact us, we will reply you within 24 hours and provide you with a satisfactory solution.