There is a story about a boy who made a backpack that had a big bottle in it and he attached a cup that had a tube so he could fill up the bottle with soda. When you buy a soda at a fast food restaurant you get free refills, So how much soda you take is not defined in the purchase. The idea was to pay for a soda and take more of it home for later. But I guess you would not understand that because you are just a computer algorithm.