http://www.artbox.co.uk/index.php - 7.90pounds
I fear that if I had a little donut friend in my purse all the time, I'd get hungry constantly! Maybe if they doubled as pez dispensers?
Available at Shiny Shack http://www.shinyshack.com/product.php?prid=214826&pn=Sparrow-Keyring-and--Holder---Green ($15)
Can't find your keys? Whistle for them and the pooch will bark so you can find them!