64 oz (1920 ml) Natural HDPE wide mouth round bottles with 100-400 neck finish, bottle only (no caps). natural HDPE wide mouth round bottles are ideal for general lab use with solids and powders. These HDPE (high-density polyethylene) bottles provide an excellent moisture barrier, are translucent, and are impact resistant. These bottles are ideal for high-speed filling, demanding pharmaceutical specifications and the rough handling of interstate shipping. order caps separately based on your application.