All that careful, thrifty shopping you're doing isn't only making you fatter, but it's also probably wasting your money. You can bulk-shop in two different ways; you can either buy a single huge unit of a foodstuff (say, an eight-gallon tub of pretzels) or you can buy a whole bunch of single-serving packages (a pallet of 48 juiceboxes.)
What you're thinking at the time of purchase: "For the price of one trip to a restaurant, I can have a year's worth of pretzels and juiceboxes!" You then cart your purchases home and immediately start devouring them at twice the rate you would if you didn't have so damn much of them (according to a survey published in the Journal of Marketing Research).
This foodthusiasm lasts for about a week, after which your insides are so clogged by juice and pretzels that every time you see their hateful forms squatting in your cabinet your throat seizes shut and your gut fills with bile. And thus it is that your smart purchase migrates its way to the back of your pantry while you go and flush out the pretzels with a cheeseburger.
This panda thinks he's laughing all the way to the bank, when in fact he is going to the emergency room (he has diabetes.)