Commercial for Coca Cola in 2 liter bottles; a young boy talks about Coca Cola being sold in a new, returnable 2 liter bottle; he does math in his head, and calculates that it holds more than a half-gallon; mother walks in and asks about the price of this; he thinks about it and calculates that two 2 liter bottles equates to one 6 ounce bottle for free; mother happily tussles her son’s hair and says, “now that’s quite a bonus!”