Rigid Plastic #6 (Polystyrene) Put in Recycling Cart There are different types of plastic #6. Rigid plastic #6 is used to make items such as CD and DVD cases, plastic utensils and plastic cups. Rigid plastic #6 is accepted in your curbside recycling cart. Foam Plastic #6 Is Different Foam plastic #6 is a different material than rigid plastic #6, so it has different disposal options. Rigid plastic #6 is smooth and glossy, while foam plastic #6 is porous and dull. Find out how to dispose of foam plastic #6. Did You Know? What Items Are Made From Rigid Plastic #6? Items made from rigid plastic #6 include disposable plastic cups, lids for paper coffee cups, CD and DVD cases, clothes hangers and plastic utensils. Plastic in Our Bodies Styrene, a component of polystyrene, has been found in 100 percent of human fat tissue samples dating back to 1986. It is known to cause cancer in animals, and suspected to be both cancerous for humans as well.