38mm Jug & Growler Screw Caps – Polyseal, Metal & Airlock Options

38mm replacement caps for jugs and growlers used in home winemaking, brewing, and fermentation. These caps fit standard 38mm glass jugs and growlers, including 1 gallon glass jug fermenters.

Available Styles:

• Plastic Polyseal Cap – Creates a tight seal for storing liquids.
• Metal Cap – Oxygen barrier metal cap for secure sealing.
• Plastic Cap with Airlock Hole – Designed to hold a fermentation airlock.

These caps are commonly used with 1 gallon glass jug fermenters for wine, cider, mead, and beer fermentation.

Compatible with the One Gallon Clear Glass Jug Fermenter and other standard 38mm jugs.