Students at Woodward Elementary School are learning the meaning of the adage, "one man's trash is another man's treasure." In the students' case, the trash consists of discarded juice pouches. For one New Jersey-based company, the little unwanted pouches represent the treasure. TerraCycle, a company founded by Princeton University students Tom Szaky and Jon Beyer in 2001, has matured from a small start-up showing people how to compost with earthworms to a global leader that takes garbage and "upcycles" it into usable products. Students earn two cents for their school for every empty juice pouch donated to TerraCycle. But they say one of the best parts is having the chance to see their used pouches transformed into backpacks.