Airlock - 3 Piece
This 3 piece airlock fits in any standard fermenting bucket lid or drilled stopper. Fill half-way with water or sanitizer. Can be taken apart so it's very easy to clean and can be turned into a blow-off system using 1/2" inner diameter siphon tubing.
Using the twin bubble air lock is also a great way to protect your precious wine or homebrew, especially if you are going to age the wine or beer out a long time.