... piece.Quality certificate: environment-friendly borosilicate glass, virulent and inodorous,safe for food, have passed the green food ... .3.Processing technology: handmade, best equipment, oldest technology, and modern technic. Packing WayInternational certificate standard: SGS,ISO9001,FDA ... ’er tea, craft blooming tea, fruit tea, coffee and milk is also ok.The series of filter cup borosilicate glass ...