I had a Batman lunchbox, after I broke my Bonanza lunchbox while riding my 3 speed banana seat bike to 2nd grade.
As you may remember, the lunchboxes came with a thermos lined with glass. Ever open your thermos at lunchtime only to find a hellish mix of glass shards and 2% milk? Who am I kidding, I never drank 2% when I was a kid. It was full strength, and we liked it that way.