Board Thread:Off-topic discussion/@comment-3362895-20170717015109/@comment-3362895-20170717054527

The way I see it, if you can't find an exact replacement cap with the same threading to match the outside of the neck, you'd have to find some kind of flexible plug to fit the inside of the neck... like a squeeze-fit cork for a wine bottle. Or maybe a sink drain plug.

Hmmmmm. 🤔