Honestly - I'm not sure where my parents got this...
But it's been a part of our lives for twenty years or more -
They would save their 'silver' [change from their pockets]
in it until it was full and then each gr-son took turns emptying it and taking it home -
Just a little extra gift to them -
a lesson in waiting until it was full, and learning to take turns...
Since Matt couldn't think of anything specific he wanted when Mom emptied her house,
she made sure it came home home with him.
It'll be a treasure to him once he's settled in his own home.