There was something I neglected to mention: this is a contributing factor to food going bad.
Nobody these days has the time to shop every day to purchase everything fresh to be prepared that day, especially if you are self-employed. What is compounding her problem is that the stores near her have been raising their prices insanely so that she has to now go three neighborhoods away to shop, which is impractical to do more than twice a week.* This requires serious meal-planning and containers for preservation of fresh ingredients and/or leftovers.
There were some leftovers at the party, which I put into those containers and stacked neatly in the fridge. They needed that food to see them through a week of heavy work with deadlines (They work at home).
As for the plastic wrap, I brought mine with me this time, used what I needed to, and took it back. Neither of us had the $$$ to waste this year.
*She and her husband have a rent-stabilized apartment, for anyone suggesting they move.