A foil bag is a type of packaging made of a thin, shiny material called foil. It is used to keep food or other things fresh and protected from air, moisture, and light. Full definition
Prior to their merger, Snyder's of Hanover and Lance were both known for driving category growth through innovation since their origins and expect even greater opportunities for the future; Lance provided the first peanut butter sandwich cracker, for example, and Snyder's was the first company to put potato chips in foil bags. (fooddrink-magazine.com)
Del Real Foods Fire Roasted Fresh Red Salsa / Salsa de Molcajete Roja 48 oz (3 / 16 oz Packs) NOTICE: Product will be packed cold for freshness with ice packs in a cooler or insulated foil bag. (mexgrocer.com)
-LSB-...] really nice served with some simple potatoes cooked in an aluminum foil bag on the grill and some broccoli. (strawberriesforsupper.com)