Made kiefer and the lids worked great.

I love these lids! So easy to use and clean. I'm so glad I bought these and I recommend them to anybody who ever asks me about making kefir :)

Easy to use and to clean.

I've been using these lids for a couple months now. I'm using them for both kefir and my sourdough starter. So it's nice it comes in a 2-pack. I like that I can pop them in the dishwasher if needed. Of course, one can simply use fabric or cheese cloth but I'm finding this set is a nice alternative and less likely to get lost to the sock-monster in the laundry. It took me a couple days to get used to the guides for how open the vents to different openings but once I got the hang of it- it was fine. Overall, not necessary but nice, especially if you're the type of person who ends up with little tangled wads of cheese cloth or has a tendency to lose your covers. That being said-- it is plastic so be sure to plant a tree to offset your carbon footprint ;-) so you can sleep soundly at night.

These brewing lids work perfectly to cover brewing water kefir in standard wide mouth mason jars. The mesh is tight enough to keep out ants, dust, and debris while letting air flow out. I had been using coffee filters secured with a rubber band. These lids are faster, easier, look more tidy, and don’t use up your coffee filters. The instructions had a note about not tightening them too tight (might be hard to remove if you do.) There doesn’t seem to be any reason to crank them down tight. They’ll do their job screwed on loosely. The screw on portion has indents to allow you to get a good grip on them. It’s nice that they come in a pack of two, so you’ll always have a clean one available.