If you wouldn't throw out the mismatch eventually you would have matching sets.... unless it's like the green base waterers I have. The tops broke and the new ones are different and don't fit.....they got bought out.Every once in a while I go on a Tupperware rampage. Anything that does not have a corresponding lid/bottom is out. Actually just the lids. I use the bottoms to sprout greens for the poultry and to store the odd socks.
I confess to also wearing mismatched socks but I hear my mother voice - "what happens if you have an accident. What will the doctors think?"
As far as accident and hospital
Brightens their day.
Just gives the nurses and Dr something to laugh about.