Review (3/5): Lids slide off
These are cute (very small) dishes and I use them for acetone but the lids don't "register" in place and slide off with any small nudge. There was a protective bottom fabric that came off the first day, possibly related to the acetone. It's a good size dish for acetone, preventing it from evaporating as long as the lid is on. Too small for monomer though.
Overall, I wouldn't pay $9 for another pair and would look for a dish with a lid that stays in place.