If there is one disposable kitchen item worth keeping, it is certainly tinfoil over plastic wrap.
Alumininum foil has oh-s0-many uses, doesn't it? So many, in fact, that we are actually out of it right now, after crafting my youngest's tin woodman hat for Halloween (but I digress).
The point is, in terms of food preservation--aside from pre-fitted lids, beeswax wrap, and tupperware, tinfoil is our best ally as it can both insulate food and it can also be recycled when no longer needed (granted there is not a thick layer of cheese baked onto it).
Cheers to homemade Halloween costumes and steps toward zero waste!