Zazolyne 5Pack Fermentation Airlock,Twin Bubble Fermenting Improved High Transparency S Shape with 10pcs Grommets Drilled 3/8’’ Hole

The air locks with this type of lid vent around the top of the air lock and out the bottom of the red cap. I have seen other reviews for similar ones where people were complaining about the caps not having holes in them. These do not need the holes in the top because they vent differently than the ones with clear caps. 2 of mine had very small holes in the bottom of the water reservoirs and would not hold water. But after a quick chat with the seller I had a replacement in a few days. I would recommend these air locks and the seller had great and quick customer support. The only thing I have noticed is the description and photos say to drill a 3/8" hole for the black rubber grommets. This is wrong, the inside diameter of the grommets is 3/8 for the air lock to slide in. You need to drill a 12mm hole in whatever lid you are using to fit the grommet properly.

Great product that works as directed. Bought this more than a year ago and still works.

I know something so simple could bring one person so much joy these things right here are just fun to watch and it takes out all the question am I doing it right or is it working for the beginner and for the price how could you not

they work fine

This product works great. I will order them in the future.

Excellent fermentation airlock for making homemade wine.

Simple to mount, just as per images and description

Works pretty well for adding and airlock to existing containers, but one of the airlocks included had a hole in it that defeated the purpose of having an airlock. It should be easily patched, but check to make sure they’re airtight before it ruins your hard work.