Plastic #4 (LDPE) Special Instructions Rigid #4 plastic containers such as bottles, jars, tubs and trays may be recyclable and belong under the blue lid of a split recycling cart or in a larger cart or bin labeled “Containers Only.” They must be empty and should be scraped and rinsed if possible. Lids can be left on. Removed lids belong in the garbage. #4 plastic items that are not a rigid container belong in the garbage. This includes tubes (like those in photo) and bags. Too Thin to Recycle Plastic films, such as plastic bags, plastic wrap, frozen food bags and many other plastic #4 items, are too thin to recycle with hard plastics. Find out how to dispose of plastic bags. Help Prevent Litter Plastic #4 is a lightweight material that easily finds its way into the environment, where it can leach toxic chemicals. Dispose of it properly to prevent it from becoming litter. Did You Know? What Plastic #4 Can Become Plastic #4 can be recycled into shipping envelopes, paneling, tiles, plastic lumber, trash can liners and trash cans.