These work great and it's nice to have some extras on hand. We've broken a couple after some drops on hard floors with full water bottles, but they usually hold up really well. Nice to have the flexibility to easily attach a lid for on the go.

Leaks to much

This is a gift for someone, so I won’t be using them.

I really wanted to like these. I was skeptical of the rings being plastic but gave it a whirl since there were no other options on the site. We converted one of our jars into a sippy cup and it took about 20 seconds for my 12m old to drop it off of his high chair. The ring snapped and liquid went everywhere. Do not buy these if your kid will ever drop the cup...

The bottles leak and waste precious breast milk. There’s no way to perfectly line up the plastic rings on the jars so they leak or bust off if you attempt to tighten them. Im very disappointed and we wasted so much money.

These work so well!

These work great and I love how they can have a lid snapped on them for taking on the go. However, the plastic breaks far too often and easily for us. I've bought so many extras because they keep breaking when being dropped on the floor, which is a fairly common occurrence with an infant and toddler. Wish they could toughen them up somehow so they last long and I don't have to keep throwing them out and replacing them.

I’m very happy to have found the plastic rings and sippy straw tops. I was spinning my wheels trying to find a glass sippy cup for my daughter. It leaks from the plastic rings but I’ll manage!

The plastic rings are nice since they don't rust but they don't always hold up to drops from the dining table onto our tile floor. If the hinge breaks cleanly we can still use it but we usually have to throw it away since it can have sharp edges after a fall.

I kinda thought I wouldn't need this since I have a ton of the metal ones, but these work so much better. They have a way better seal for preventing leaks!

The rings fit on all my mason jars at home. I love the versatility!

These rings work great except they break easily. My 1yr old likes to hold her bottle now and wether it’s in a glass mason jar or the metal one when she drops them usually by the third drop they chip or break completely.

Excellent quality, strong/sturdy product. No rust or breakdown.

The rings are deeper than standard metal rings which gives more thread to grab the bottle when using with accessories like bottles and other tops. I did break my first one the first day I used it by dropping the bottle just wrong, but so far round 2 is surviving much better. I was getting tried if spring through rusty bent rings and risking leaks! Also bought some for my mother-in-law and sister-in-law for their Mason accessories! My baby insisted I remove the little loop where the lid clips on, and it came off quite smoothly.

These are seriously the best!! I love that they’re made in the US and that I can use on any regular mouth mason jar! Such a brilliant idea!!

I bought these for my husband since he swears the one we got in our starter kit seal tighter than the metal rings do... he’s as happy as he could be.

I wanted to love the whole set up of the mason bottle, but I can't seem to get a tight seal on the jar with these jar caps and my son's milk just leaks all over the place whenever it's tipped to the side.

These rings are really nice to have so we don’t have to worry about the metal rings rusting. The nipple tops fit in perfectly, we never have any leaking. They create a tight seal.

These are so superior to the metal rings it’s not even a comparison! I had tried to make sippy cups using the metal rings and they just kept popping off. I’m so happy I found these! They’re perfection!!!

These work as expected. Nice to have backup for usual metal rims, since those occasionally warp or are uncooperative.

Good product just needddd replacements, glad they are inter changeable on the jars and your bottles and mason bottles

This was a baby shower gift. She loved it.

I had trouble at first liking these up on the glass but I got the hang of it. Way better then metal rings!

One of the best purchases I’ve made since becoming a mommy! We don’t have to worry about rust getting into our lo milk, and I even use them while pumping strait into the mason bottles. I highly recommend these!!!

The metal tops that came with the mason bottles I bought rusted after 2 dish washer trips. So glad the plastic ones are available!

Leaks which is very frustrating. It soaks my hungry baby and wastes breast milk.

I was using the metal rings, seen in my picture, and they kept getting rusty. I knew I had to get the plastics! They work so well and wash/sanitize wonderfully in the dishwasher! Love Mason Bottles!

Love the idea of these bottles. They are easy to clean and cute…. But, the first time my daughter dropped the bottle, the plastic ring broke. Thankfully the silicone sleeve was on and the glass itself didn’t break. Plus, they are a little finicky and leaky if they aren’t screwed on just right. Disappointed.

Previously I was just using regular canning rings but when they started to leak a little I wanted to try theses rings because I love the nipple shape and mason bottles. Definitely recommend getting the plastic rings they stopped my bottles from leaking!

The rings are easy to use, clean, and don't rust like the metal rings that we had already. Love them!

I absolutely adore these bottles! They are so versatile and I've recommended everyone I know to buy these! they are clean, durable, non-toxic, and fit everyone's style!