Plastic #4 (LDPE) Put in Garbage Did You Know? What Items Are Made From Plastic #4? Plastic #4 is used to make flexible plastics including plastic shopping bags, bread bags, dry cleaning bags, sandwich and snack bags, and squeezable bottles and tubes. What Plastic #4 Can Become Plastic #4 can be recycled into shipping envelopes, paneling, tiles, plastic lumber, trash can liners and trash cans.