The cups are made of high-quality lead-free glass, which has a matching bamboo lid and a spoon in the shape of cherry blossom. The thickened bottom of the cup is not easy to break, very simple, convenient and easy to clean..The mugs can be used for many types of hot or cold drinks.More suitable for moderate temperature beverages.You can use it to drink coffee, wine, tea, juice, milk and more..Classical Vertical Stripes Glass gives the cup a unique design sense. Each cup looks like a work of art. When you use such a cup to drink, you will also feel comfortable..The pretty tea mugs should be handwash only. Don't put in the MICROWAVE, FREEZER,DISHWASHER or OVEN..If your glass mugs break within the first year of purchase and you haven't asked for a refund or replacement, we will ship you a replacement for free covering the shipping cost.