?Stovetop Safe?Our tea cup with infuser and lid are made of borosilicate lead-free glass and can withstand temperatures from -68F to 302F. The tea mug can be placed directly on stove top or electric stove. ?Ultra-fine Stainless Steel Filter? The glass tea cup comes with a filter made of food-grade 18/ 8 stainless steel, which will not rust for many years. Because the mesh of the filter is fine enough, you don?t have to worry about tea leaves getting into the teapot and water. ?Multiple Uses? The filter of the tea cup is very fine and can block every particle, so you can brew ultra-fine tea with this tea cup. You can also use this tea cup with infuser and lid to brew loose leaf tea, tea bags, blooming camellia, fruit tea, herbal tea. ?Easy to control? The tea cup with infuser and lid is specially designed for one-handed operation. The handle of the tea cup with strainer is ergonomically designed to provide a good and sturdy grip, making it very comfortable to hold and drink tea. ?Wonderful Gift Ideal? This tea cup with infuser and lid comes in a beautiful box, making it the perfect gift for friends and family. (such as Mother's Day, Father's Day, Thanksgiving, Christmas, Thanksgiving).