borosilicate double-layer separation tea brewing cup good-looking transparent tea and water separation heat insulation gift glass cup

steel color 350 ml high borosilicate double layer steel color 450ml borosilicate double layer steel color 500ml borosilicate double layer 370 ml upper cap material lower cup body double layer 350 ml upper and lower single layer borosilicate 450 ml upper and lower single layer borosilicate red gift box black gift box 350 ml lower cup body double layer upper cover refined white material 450 ml lower cup body double layer upper cover refined white material caviar black quickly open cup 450ml sweet alyssum white quickly open cup 450ml caviar black quickly open cup 450ml + gift box sweet alyssum white quickly open cup 450ml + gift box 316 stainless steel tea and water separation 500ml 450ml upper and lower single layer

370-500ml