Made of High Borosilicate Glass It is a low expansion rate,high temperature resistance, strength,,hardness.Special glass material with high light transmittance and chemical stability,100% lead-free.High temperature resistance is its biggest characteristic, resistant to 180 degrees of temperature change. Compared with The Ceramic/porcelain Tea Cup/Teacup, It is Thin, Light and Transparent ① Beautiful appearance.High transparency, wonderful view in the cup, smooth surface, wear resistance, not easy to discoloration and fading; ② Sanitation.Glass is not easy to dissolve, can be used to hold any drink, not stale; ③ High temperature resistance.High temperature does not melt, does not deform. ④ HAND BLOWING HIGH QUALITY BOROSILICATE GLASS TEAPOTS: (without Lead, Cadminum, Arsenic and other Metals) Makes more thinner, lighter, capable of withstanding thermal shock, scratch, and break resistant, Create a Healthy Life. ⑤ STYLISH DESIGN TEACUPS: With glass lid and filter for loose teas or blooming teas. Just put the tea or coffee bag into the inner cup and add some hot water, then the inner cup releases infused tea directly into the outside drinking cup. The Advantages of Our Glass Teacup ✔▶The lid of the cup is thickened,It will feels thick on the hand. ✔▶The mouth of the glass is also thickened, which can effectively resist heat. ✔▶It can be heated over an open flame without cracking,Also can be used in gas stove, microwave oven, electric pottery stove, oven and so on ✔▶Pour cold water into it without cracking, and it can withstand a temperature difference of 180 degrees ✔▶You can make flowers tea, milk,loose tea, coffee and cold drink etc. ✔▶Very good choice in office, dining table, courtyard, tea room, outdoor use, easy to use and cleaning,convenient to carry. MATERIALS:Made of 45% Bone China + 55% White Porcelain;100% High Quality and Brand New;Made in Chinese Jingdezhen. CAPACITY:400ML-500ML/13 OZ.-16 OZ.,In Chinese gongfu tea, its capacity is enormous.When you're in a long meeting,the capacity of tea or coffee is perfect. PERSONAL TEA MUG:Easy to use,perfect for home or office meeting and so on.Suitable for brewing black tea,green tea and other daily consumption and entertain at home. PERSONAL COFFEE MUG:OR as a coffee mug,to brewing a black coffee/strong coffee/espresso/Cappuccino and other hot or cold drink. Beautiful cup boby use Chinese traditional hand-painted pattern,Package Include:2-Piece Set(1 Lid and 1 Cup).