I found this great old biscuit tin while out thrifting last week. It's plenty big for sandwiches and snacks for four. In fact, I already used it to take to WWII weekend Saturday. It was only $3 and in great shape, except for some wear on the lid. But no rust!
The Skotch Jug cooler is one of my favorites. I thrifted it years ago and it has been on every picnic since! It's the old style with the glass lining so it doesn't absorb any odors. (Remember how your Thermos used to smell back in elementary school? Yeah, me too- like it was yesterday. ;)