Mine was one of those big plastic ones, where both the top and bottom are the same shape, with hooks on top to hold a thermos, and little snaps to keep the thing closed. It was orange, and on the front there was a picture of Garfield the cat, getting ready to chow down on a sandwich. I had it in kindergarten, up to grade two I think. But nah, whatever happened to it…ain’t got it now. Cool question though. :)