EZ cap bottles are easy to use! No more using a bottling device to cap fifty-plus bottles on bottling day. Simply swing the grolsch-style cap over the mouth and lock the wire hood down. It's as simple as that! The cap creates an airtight seal that keeps beverages carbonated and crisp. While these amber bottles are great for beer, they have also gained popular use in the production of kombucha. The swing style caps are reusable, though the gaskets may need to be replaced occasionally. Two available sizes are perfect if you wanna stay small or go big. The choice is yours!