[Material] cup body | heat-resistant glass. Cup cover | natural bamboo + silicone. [Size] cup body | cup mouth diameter 8cm x height 11.5cm, cup lid | diameter 8.2cm * height 2cm [Capacity] 350ml [color] transparent and colorless [Place of Origin] Made in China 【Precautions】 Glassware is fragile and should be used with care or cleaning. Please wash with neutral detergent and sponge when washing. Do not use steel brush or vegetable cloth to avoid surface damage. The lid of the cup is bamboo. Please dry it after washing. Do not soak for a long time and keep it dry to avoid mildew. Double-layer glass can withstand high temperatures of 20 to 150 degrees, but do not suddenly quench and heat up. Do not use microwave ovens for heating. The double-layer glass is blown by artificial hand, and the surface has fine pores protruding or the edges are slightly uneven, which is a normal phenomenon and does not affect the quality of the product. The bottom hole is a closed hole, not a flaw, please use it with peace of mind.