Eco Friendly Popcorn Boxes Eco-friendly popcorn bags are ideal for any ecologically concerned concession stand, theatre, or event site. These bags are created from environmentally friendly materials, and many of them may be composted after use. These bags are also constructed of unbleached paper, which helps to reduce wood fiber waste. Eco-friendly popcorn boxes will help you keep your business green. These boxes are composed of sustainable materials and are designed to be compostable after use.