double wall glass cup *Material:borosilicate glass 3.3 *Feature:ECO-friendly *Business type:manufacturer DOUBLE WALL GLASS CUPQuick DetailsPlace of Origin: BaoYing,JiangSu ... wall glass cup descriptionTIANBAO double wall glass cup is made of borosilicate glass with hands blown,used for office cup,tea cup,wine cup,milk cup. ... rod, induction lamp bulbs and so on.Pictures Double wall glass cup