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Sustainability can carry over from one event to another. Intel created 400 messenger bags from large vinyl banners that had been used at a 2010 conference. The bags became giveaways at future Intel events and some were donated to schools, saving 5,500 square feet of material from landfills. "We do re-purpose other signage. The trick is to not date your material," says Lou Cozzo, Intel's corporate event marketing manager.