That's true, but I'm weighing overall consumption with the cost of saving money. The fact is, if I buy 12oz cans of Soda, I'm going to drink 12oz of soda. They're not resealable like plastic bottles--I'm either gonna drink it in one sitting, or it's gonna go flat and get dumped out. So yes, buying the 7.5oz cans costs comparatively more money, but I'm drinking less of the stuff overall, and arguably decreasing my dependency on Soda Vendor.