What are some ideas for re-purposing common disposable items?
There are many items that are disposable that we now recycle. However, it takes energy to recycle things and I was wondering if some of this energy might be saved by re-purposing the items to a second functional need with no real treatment. Examples of disposable items that might be re-purposed include soda bottles, car tires and cardboard boxes. One example of a re-purpose is car tires being bound together and turned into reefs for sea life.
I am sure there are many items and uses. What are they?
I am mostly interested in functional uses rather than artistic ones.
Closing Statement from Robert Galway
Thanks everyone for providing ideas.