I bought a few of these after they stopped carrying the glass, one piece airlocks that I prefer. These are effective, and I haven't broken the plastic (even with some rough handling) but the design allows for rapid evaporation of your liquid. I use vodka in my airlocks and am refilling these every 3 or 4 days. That is a major pain to stay on top of, along with being wasteful. The glass one piece airlocks evaporate much more slowly and can be checked every few weeks.
Reviewed by: Jesse from Spicewood, TX on 11/17/2019