Not breakfast, not dinner, LUNCH

As a family, we decided a long time ago, that "brown bagging" is a much healthier, inexpensive option for lunch time.  In practice, myself and Boy #2 always take our lunch, but Boy #1 and Dad.....not so much until just recently.
They finally get it!  As a result of this recent epiphany, I am now scrambling for options for them to take with them.  Dad has to take a cooler because there isn't a refrigerator in close proximity to his work station, and Boy #1 doesn't want to look like he's taking his lunch (he's a senior in high school).
We've done this,

And this,

But we need some new ideas.

Help anyone?  Any and all suggestions would be sincerely appreciated!