Product features Using polypropylene and 100% pure polyethylene raw materials that comply with USP Class VI standards, produced in a GMP 100000 level clean workshop; Used for small capacity liquid storage; Can be used in conjunction with droppers, suitable for weak acid and weak base solutions; Multiple commonly used specifications: 5ml, 8ml, 12ml, 15ml; 6 colors (white, purple, blue, red, orange) for the lid to choose from.