I still use a lid but i use it to hold the temp probe in the brew.
But what do you do with the kittens when you don't have an airlock?
I thought all Rappers were glad.
Especially with all the cars, bling and *******.
Another option instead of the rubber band is to use the rubber o-ring that is located in the lid for the fermenter (which may have already been mentioned).
Perfectly sized for the fermenter, and a lot more sturdy!
Sponge