Please view the full image as well.
Someone in packaging should make potato chip bags (and bags of all sorts) that are perfed every inch all the way down until you're four from the bottom. You wouldn't have to stick your arm into a greasy tunnel, and you could always see your chip options before selecting a chip. It's part of what makes a warm paper bag of roadside potato chips the miracle that it is. Just tear that shit off on you're way to the dregs.
Alternate plan: ditch the plastic and make a tearable bag. 'Bout time.