2 hours ago, gulfporter said:And often we’re heading out somewhere else (not home) after lunch and storing leftovers in the car for a few hours in our summer heat (Florida) isn’t a good idea.
Two different thoughts for when half-portions aren't feasible.
1) You could carry a small cooler loaded with reusable ice blocks, and when the food makes it feasible, put the leftovers in the cooler.
2) My DW had bariactric surgery in 2009. I told her up front that I understood that she wouldn't be able to finish restaurant-sized portions and when we needed to leave the uneaten food behind, it was ok. She does order off of the apps menu if there is something specific that interests her.
These thoughts may or may not be useful, I am just passing them on to you.