All you can drink

There was a business man driving down this country road when he spotted¹ a little boy that had a lemonade stand. Since it was quite hot and he was thirsty, he decided² to stop.

Once he got up to the little boy's stand, he noticed a sign that said "All you can drink 10 cents," and a single, very small glass.

Well, he thought that it was a very small glass, but since it was only 10 cents for all he could drink, he decided to get some anyway.

He gave the boy a dime³, and shot down the whole glass in one swig. He slapped the glass back onto the table and said, "fill 'er up."

The kid replied, "Sure thing, that'll be 10 cents."

To this the business man said, "But your sign says all you can drink for a dime."

"It is," the little boy