Dear Readers, What do you do when you get the bottom of a bag of potato chips? And if you don’t keep chips around, pretend I’m asking what you do when you get to the bottom of the box or bag or can of your favorite salty or sweet snack. By “bottom,” I mean that variable snacking moment when you shake the container in hopes that a mid-size piece may float and rise on the sea of crumbs. Recently, when I reach for a snack and find only a bag of bits returned to the cabinet by thosewho- shall-not be named, I’ll finish it (provided said snack has not gone stale.) So I’m curious how others behave when they reach this snack nadir, not that our choices in this regard mean anything.