If you wash up manually in a bowl, you can use the remnant liquid to do your recyclable washing before pouring it down the sink, but .. well, as you suggest "I ain't got no time for that".

As for your pizza box idea, I'm not sure that's not simply complicating things - now you'd have two independently-recyclable materials tha most consumers will simply leave together and dump in the box, leaving you with sorting problems, and oil going from foil to card anyway.

Also, I think the quality of the pizza might be impacted - my gut thinks that a pizza that's allowed to release some of its heat/grease into card makes it less squidgy and sweaty than one left to sit on foil. I haven't researched this though! :)

I mean, for crissakes - a neighbour in my block thinks that actual pizza crusts and leftovers are recyclable.

People!