The sample storage screw-top bottle is made of high quality 33 expanded borosilicate transparent (type 1, type A) glass or 51A amber (type 1, type B) glass. The storage bottle has a capacity ranging from 20 ml to 60 ml. 20ml Screw Neck Amber Glass Vial. Available Sizes: 20ml, 30ml, 40ml, 60ml, ND24 Wide Neck .