MasontopsKombucha Lid - Home Brewing Mason Jar Supplies - Live Organic Kombucha Making Starter Kit - Scoby Not Included 4-Pack

They work great

Super handy!

I just started making kombucha. These lids are easy to use and clean, and are effective in keeping fruit flies out of the mason jars. My only ding would be that it’s hard to find gallon jars that have the standard wide-mouth top, so I split my batches into half-gallon jars in order to use the lids.

An unconventional use, but I have used these for raising fruit flies for my frogs for over a year now. I hate the plastic waste of the typical fruit flies plastic deli cups, and this allows me to use a wide mouth mason jar instead. They have held up to numerous washings and no flies have ever escaped. However, mites will make their way in(as is the case usually anyway) so make sure you use diatomaceous earth or some other anti-mite method. I'm planning to use them now for raising small live foods for my fish.

Used on a standard 64 oz Ball Mason Jar. Let's air in but keep everything else out perfectly.

Perfect for my kombucha half gallon jars. So much more effective than muslin, coffee filters etc . Highly recommend.

I don’t make kombucha but I make water kefir and liked the idea of a breathable membrane that was washable and endlessly reusable. So I bought a pack. Works like a charm. When my kefir grains have multiplied, I give some to a friend with one of these lids.

Perfect.