Here's one tip on how food/beverage and consumer product companies can have the best giveaways in trade shows and conventions. Best of all they're eco-friendly!Trenton, New Jersey-based startup firm TerraCycle is upcycling used food wrappers, drink pouches, empty yogurt containers, corks and soda bottles into pencil cases, umbrellas, pouches, bags, garbage cans and shower curtains.