Product review (4 stars): These were just what I needed to keep food particles ...
These were just what I needed to keep food particles from between the cracks.  They blend in well, and aren't really noticeable.  They arrive folded in thirds, though.  It takes a while before they flatten out all the way.  I placed a couple of small crocks on top, when they were in place, and heated them with a hair dryer, and it seemed to help.  They clean well, and can be put in the dishwasher to clean, if you get a nasty spaghetti sauce spill, or something.