You buy groceries.
You need something to carry your groceries back home.
Plastic bags are lame.
So get yourself one (or five) of these beauties.
These bags measure 7"x13"x15" so they're large enough to haul some real food. But, they're not so big as to be unwieldy. Plus they even have a 'Don't Forget' shopping list printed on the side to help make sure you remember the, cooking-from-Skratch, essentials!