Plastic Caps Put in Garbage/Landfill Loose plastic caps belong in the garbage. They are too small to sort and recover for recycling. Please leave caps on bottles. Plastic caps that are left on the bottle are recycled. Not Infinitely Recyclable Plastic isn’t infinitely recyclable in the same way that glass and metal are. Its quality declines each time it’s recycled, so new plastic needs to be added in order to keep recycling it. Ways to Reduce Opt for Reusable Containers Most plastic is made directly from oil and natural gas, not recycled plastic. When plastic does get recycled, it is often into products that are no longer recyclable. Metal and glass, which are durable and can be recycled infinitely, are always a better container choice. Choose Glass or Aluminum Glass and aluminum are both more recyclable than plastic. If buying something in a single-use container, opt for glass or aluminum whenever possible.