Jumbo Sizes

Big containers encourage bigger helpings. Avoid buying jumbo-size packages of junk food.
If you do all of your shopping at wholesale warehouses, you could be padding more than your wallet. Colossal containers cause portion distortion, which makes us reach for 25 percent more than we would normally take. This goes for everything from laundry detergent to stale popcorn, says researcher Brian Wansink at the Cornell Food Lab. No wonder we run out of everything so quickly! And if everything you eat comes out of a mammoth package, you’re likely eating much more than you realize.
While you don’t necessarily have to stop buying in bulk, you should measure out your serving sizes so you know how much you’re taking.