Sometimes, an item doesn't live up to its hype. Sometimes, an item just flat out doesn't work.
First off, they're plastic so really, they were doomed anyway. Adding to that, they just aren't functional. These were intended to make growing my own sprouts in a mason jar easier. The problem is they don't fit any jar I've ever tried to fit them onto. They appear to screw on like the metal rings that hold lids in place... they don't. Finally, I took the circles of metal screen out and used the metal rings that came with the jars to hold those in place. Works like a charm. These? Completely useless. I avoid tossing anything in the trash whenever possible, but this time it can't be avoided. No one's going to use these. =(