Garbage is irresistible to some of the most devoted eco-entrepreneurs. Already old hat are the many crafts industries producing purses and totes made out of tossed-out potato chip packages and bottle pop tops. Always looking for new notions, recycling firm TerraCycle has a 25,000-square-foot warehouse in New Jersey stuffed with old Skittles bags to fabricate into kites, Capri Sun juice pouches for backpacks and chip bags converted into coolers. The company makes pet toys and garments out of emptied dog food bags and is seeking constructive uses for expired pills, old pill bottles and razor blades.