bob&rsquos, a brazilian fast food chain, is tackling the environmental influence of food packaging by offering a burger wrapper that is completely edible. bob&rsquos, which is the south american franchise, is wrapping food in a paper that is derived from rice, which customers can wash down with a side of coke and fries. nbs, which is the retailer&rsquos advertising agency, first worked out the advertising campaign to illustrate the irresistibility of food, but the stunt took an unpredicted turn for the better.