This is a professional and popular product in our store. A completely handmade and perfect product. It looks a glass, but in fact it is made of plastic. So no need to worry about cracking at any time. Size is also carefully designed and considered. A small gimmick but has high quality. Appearance, disappearance, transfering, ...... such as, wine disappear, appear, transfer to a silk or throw streamers, Anyway, this is a multi-functional goblet. Usage is endless.