I dont know about stories but it reminds me of one of the Irish jokes:

Paddy meets his fairy godmother who gives him three wishes:

FGM: What would you really like?

PADDY: I'd love a ever lasting pint of Guinnes so when I reach the bottom, it fills itself up again.

FGM: You wish is my command.

Paddy gets his pint and to amazement, everytime he drinks the last drop, it refills and a perfect pint everytime.

FGM then says "that is you're first wish, you have 2 more to go what else would you like" and Paddy say's "I'll have a couple more of the same".

Jon