Similar to Cash Stash as sold on Firebox (for £5.00)
this is actually $1.55 which works out to be about £1.00 after you go through paypal
you could use this to store rolled up notes (money) for emergencies.
you could also use this on your pets collar, incase they get lost (with a note of address and maybe a reward promised if they are returned)
Firebox Cash Stashhttp://www.firebox.com/product/2393/Cash-Stash-Keychain?via=cat