... :A1 exported to Germany,Korea,Japan,Australia etc commodity:double wall glass cup material:borosilicate glasstechnics:lamp blown grade:A1specification:typeweightcapacitytop diabottom ... workmanship,of high clarity and good texture2.made of borosilicate glass,tasteless&odorless and safe to the food 3.wash easily ... water and the boiling water together at the same time double wall glass cup