Don't you love it when you get two for one? Coca- Cola's "Friendship Machine" gives you a two for one deal all right, but not without a little bit of hard work. Based in Argentina, Coke introduced a supersized soda machine that raised the buttons, so that one must get a boost in order to put the money in the dispenser. In return for helping someone out, they might just give you the free Coke they got with the one they paid for. You know what they say—nothing comes without a little hard work.
(page 180 in Goodvertising)