I must say that this simple little item has made such a good impression on me.
It really works on a couple of levels.
You store your cut onions in it obviously. First off it keeps the cut onion fresh.
Secondly it keeps the smell inside the container and not your fridge.
Third it is obvious to everyone who looks in the fridge where the onion is.
It stopped the family from cutting open a new onion when one was already available.