I almost gave up on these. I wanted to love them because the concept is so cool. I kept twisting and it wouldnt lock down like it didnt fit. I got discouraged by other reviews. Then, in a fit of kitchen rage, I pushed firmly down on the ring and lid trying to force it to seal and the lid popped into the ring head space. I honestly thought I broke it at first because it made a horrible noise. But, now it fits like it is supposed to and I dont have any issues with leaking or ring fit. For reference, these are regular mouth Ball brand mason jars and lids. Hope this helps someone else!I gave a 4 star because I really should not have to be in a fit of rage to make something work as intended.
Rating:
[4 of 5 Stars!]