Use modern IT to implement dynamic codesharing, providing an interline journey following an optimized flight plan, rather than a static agreement.

If biofuel could be bought/added with points, people could spend their "soon-to-be-expired" points on biofuel rather than something unsustainable.

Finger food that's easy and clean to eat reduces the need for cutlery and packaging. That's less weight and packaging and opens up for fun, hearty snacks.

Almost all passengers have their own phones/pads these days. Keep them connected with *good* wifi and IFE wont be needed, massive weight savings.

Inflight sales of biofuel, the one buying most rewarded and recognized at the end of the flight, if flight is all biofueled all contributing share big pile of EB points

For hand wash tissues, hand out from a larger container instead of singles wrapped in plastic.