Ball Leak-Proof Plastic Lids for Glass Mason Jars, Used for Canning, Pickling, Juice, Jam, Jelly (Regular, 6 Count (Pack of 1))

I drink cold coffee every day that's hot-brewed the day before then refrigerated overnight. This coffee gets poured right after it's brewed into a large Ball Mason jar, then I put a lid on and shake a little to mix the sugar and creamer. This was done with the metal lids for years but they kept rusting which affected the way they sealed. It was hard to get the metal lids closed in a way that would prevent leaks. The metal lids were cleaned in the dishwasher and I would remove and hand dry them after each cycle. I saw these plastic ones and thought I'd give them a try.Upon my first attempt to seal the jar of hot coffee, there seemed to be some slight leakage. I didn't want to go back to the old metal ones so I kept using them but tightened them a little more. After a couple of times of use and cleaning, I noticed that they weren't leaking anymore. I don't know if the heat from the coffee or me tightening them more to prevent any possible leaks did it but there's no more leaks. I really like them now and find them easier use than 2-piece metal ones. My advice when you get them would be to wash them and put them on a jar really tight before you use them the first time if you'll be storing/shaking liquid in your mason jars.I like them. They've made things easier for me. They don't rust and they don't leak anymore.

I’m so happy for these plastic lids. I used to use the old school metal combo lids, no more.If you don’t need to cook your finished jars these lids are awesome.Lids seal completely and tighten easily.No worries about leaking. A bit more expensive but for me worth for convenience and speed.

It fits well on my mason jars and creates a good seal.

These lids are just what I was looking for. They are great for storing liquids in mason jars - no leaks.

Love these. So easy and work great.

Covers work well & there is no leakage...Much better than rusted canning covers..Price is higher than some stores ..I saw same covers @ supermarkets & Walmart cheaper by $2.00..

Good quality. Seals nicely. Cleans easy. Adds functionality to a classic mason jar.

These are a fantastic alternative to the metal lids especially when you are using g them to store sauces or dressing - you don’t get that metal flavor, the seal well, and of course the won’t rust!