Rigid Containers
Rigid containers are simply thicker gauges of foil that have been
formed into semi-rigid containers to bring the convenience of modern
food technology into our homes, schools, and restaurants.
Rigid containers, like foil sheets, provide an ideal barrier to
moisture, light, and air. Rigid containers are perfect for holding
leftovers and catered food items because, unlike other types of
containers, rigid containers do not get soggy or wet—and they can
be easily recycled.
Also, contrary to popular belief, foil-formed containers are
microwave safe. As long as foil containers are placed on a ceramic dish
and do not touch the side walls of the oven, they are completely safe to
microwave.