FerMonster PET Carboy 6 Gallon (Includes lid w/hole)

I'm enjoying this carboy. While it is plastic and a bit flexible, it is light and incredibly easy to clean. I appreciate the wide mouth so I can get my arm in and clean very well. The lid seals well also. I bought it because it was a small enough diameter so it fits in my temperature-controlled fridge.

Used a glass carboy for a couple of years, I won't go back. I bought the 7 gal, and it rocks. Seals as it should, yes you have to crank it down - a lot better than the ones on Northern Brewer, these have smooth walls, very easy to clean.

While this seems like a good idea, in practice it's pretty useless as a fermentation vessel. It simply will not seal. The O-ring in the lid does not seal well enough so you get leakage around the lid/cap. In addition, the hole in the lid is not perfectly circular, so the bung leaks gas as well. I was afraid my batch was not fermenting because the airlock wouldn't bubble but I visibly see that it was active and could smell the yeast and hops. It's not worth risking contamination of entire batches to have the convenience of a large opening for cleaning.