I hope you don't need to open the jar ever again.

It works well, I used it on a large jar with coldbrew coffee. It did not leak when pouring or anything like that. It's a little thick, which causes it to bend the metal of the ring part of the lid, making it every hard to take off. After the 5th use we could no longer get the lid off the jar at all and ended up having to throw out this lid, and our large Mason jar. Great..

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