Gallon Jug Cap

thingiverse

This is a straightforward cap for a standard gallon jug. I'm considering using something similar for brewing or another DIY endeavor. I've made one with a sizable opening that allows a 1/4'' or 6 mm tube to pass through.\r\n\r\nI put the unmodified cap to the test by filling a gallon and holding it upside down for sixty seconds. The jug remained watertight, with no signs of leakage, indicating a good seal.