These work very well. I have 24 oz. Mason jars with silicone sleeves. The band that came with the drinking lids did not fit but I used the bands that came with the jars I ordered from Amazon. I have 3 different lids and use them all. I keep water jars all over the house! Love them. Easy to wash.

My original was defective (I thought that's just how it was) and MJL was nice to send a replacement. The new one works much more like I'd expect. I don't really have a problem with the tiny air hole, like other reviewers, you just can't engulf the mouth piece when you drink! It is so nice to drink from, especially if you put ice in the drink. I bring it to work everyday for my iced coffee.

Perfect

I bought the drinking lid and the pourable lids. The lids with the pour spout are great, no leaks, perfect for storing and using salad dressing and maple syrup. The drinking lid has been working well so far. It was hard to get it on tight enough so it wouldn't leak, but once I figured that out, it has been leak free. I am curious to see how it lasts in the long run.

I've been using this lid on a small mason jar to use for creamer in the fridge, and it works perfectly - no leaks of any kind. Hooray!