I agree that we should find an alternative to plastic.
If a plastic container is already available I believe that we should continue to use and reuse it rather than discard it and use additional resources on the manufacture and distribution of an alternative material like wax paper. Don’t let perfect be the enemy of the good.
Maybe we could also examine our eating habits and gradually change our packed lunch choices to things that don’t require additional temporary packaging.
Learn to think outside of the lunchbox, an apple and a hard boiled egg might be better choices than a portable sandwich.
“Do what you can, with what you have, where you are.” - Theodore Roosevelt