They did help my leafy greens last longer but only for a few days more. I don’t know how others are getting weeks out of theirs. Also, this size doesn’t fit a full 6oz bag of baby spinach. You can see it’s packed tight and overflowing. This won’t work to keep the leaves fresh. They won’t breathe and they’ll get slimy and soggy. I had to use the large one for my bag of spinach. They’re easy to clean by hand. I don’t recommend the dishwasher because they’re plastic and could melt or warp. I like that they’re clear so I can easily see what’s inside and they also stack nicely.