64 oz (1920 ml) Clear jug with 38-400 black pp cap & PTFE disc attached, 124 x 265 mm. Approximately 2 liter clear glass bottles with shoulder loop and black pp cap with PTFE disc attached. clear jugs with molded finger grips are the perfect storage solution for large quantities of liquid. glass is inert and protects against gas and product permeation. clear class provides maximum visibility and sample integrity. Attached 38-400 polypropylene caps are known for good impact strength, cost effectiveness, & pliability. These caps are autoclavable if the disc is removed. inner PTFE discs are made of 0.010 in solid virgin PTFE. often used for environmental sampling. easy-to-clean, remove, and replace.