If you eat at the same restaurant a lot, and it's a family restaurant that cares about the little things, you can usually arrange with them to give them some of your own reusable containers. Call for delivery, food shows up in your own little glass+rubber storage boxes, you eat it, and then wash it up (or, as the article suggests, get a maid to do that bit.) Every once in a while, bring the stack of clean boxes back to the restaurant for them to use again.

Note that this system is already how many catering services work. Except that in those cases, the caterer will also take away the containers themselves. (Personal catering—i.e. "an arrangement with someone who cooks to prepare meals for you and stock your fridge with them"—is a commonly-consumed service among both the upper class and the physically disabled. But oddly, outside of those two contexts, you just never hear about it.)