Glass tea mug is the purest and safest material to contact with water,100% Hygienic. It has super chemistry stability: acid & alkali resistant, and anti-corrosion ability. This glassware is very friendly to hot drink when goes with a Hot drink, thin wall allows the liquid inside being heated quickly, while the handle protects people from hot touch, perfect of hot and cold beverages Humanity design the comfortable, wide opening and thick handle is easy to grasp and especially perfect for the sleepy or shaky hands The glass coffee cup it's a serious brew tool indeed, which is helpful in making instant coffee / tea / tang / chocolate etc. Safely packed in a polyfoam inner and sturdy box, if you're not 100% happy with this cup for any reason, Please feel free to contact with us!