All you can drink for a dime
There was a business man driving down this country road when he spotted a little boy that had a lemonade stand-- it being hot and him being thirsty-- he decided to stop. once he got up to the little boy's stand, he noticed a sign that said "All you can drink 10 cents", well, he thought that it was an awful small glass, but since it was only 10 cents for all you can drink, he decided to get some anyway.
Well, he gave the boy a dime, and shot down the whole glass in one swig. so he slapped it back onto the table and says, "fill 'er up." and the kid says, "sure thing, that'll be 10 cents."
To this the business man says, "but your sign says all you can drink for a dime."
"It is," the little boy replies, "that's all you can drink for a dime."