Popcorn, as one of the popular snacks, is widly welcomed in Europe and America. While for custom popcorn bags, people prefer yellow color as a base, since yellow is the color that most like popcorn. Besides, most people prefer back side seal bag like below pictures. For common popcorn bags, people like to have it in glossy surface, PET/FOIL-PET/PE, while there are some popcorn bags that needs to be filled with nitrogen, then the material better can be PET/FOIL-PET/CPP. About thickness, since popcorn is very light, generally 60 microns will look ok and enough to use, but many people like to make their bag look in a higher quality, so they use 80 microns, 100 microns, 120 microns and even higher.