This is fascinating stuff.
What is yours like?
I have numerous ones..
At dads I have a red safe thing.. I got it free when I made a HSBC back account xD and I also have a Winnie the Pooh one, it's a tin in 3 sections and it twists xD
and then at mums I have a big Eeyore one, and a heat shaped one I got off my friend that says 'saving for a rainy day'