Each pack of Papa Chef soup is sterilized using retort technology and sealed in food-grade aluminum pouches — no refrigeration needed. We proudly do not use preservatives or artificial coloring, but for flavor enhancement, some products may contain MSG.Perfect for busy workers, students, or travelers — ready in just 3–5 minutes.Storage: Store in a cool, dry place away from sunlight Heating Instructions:Boil in bag for 5 minutesOr microwave 2 minutes after pouring out