What is a litter free lunch?

Question

My Daughter is going to the park with her class tomorrow. She came home today with a note "bring a litter free lunch tomorrow"..

What exactly does this mean?

Answer 1

Just what it says.

Pack her lunch in a lunch box and use nothing that will be thrown away.  Use a lunch box, not a bag.  Put her drink in a thermos instead of a juice box.  Use Tupperware for sandwiches and snacks instead of plastic bags.

She will bring a lunch and leave no trash behind.