disclosed is a container , made by folding , with fold - in flaps , for packaging food . the container can be recycled economically , i . e . with a profit . the material consists of a metal sheet coated with a plastics skin which , when the metal is recovered , produces no residual matter or pollutants . the edges of the containers are welded to each other by the plastics coating . after bending open the flaps , the container can be easily laid flat by hand without it springing back and used containers can be collected in compact form in a recycling container and transported in the recycling container to the recycling facility where the metal is recovered by melting .