According to Kyushu Drunk Catering Network, the shelf life of sandwiches will not be too long, otherwise they will be easily contaminated by bacteria, moldy and deteriorated. Generally, it is recommended to eat them within 4 hours at room temperature. The leftover sandwiches can be wrapped in plastic wrap and stored in the refrigerator for 2-3 days.
Sandwich is a typical western food, which is made of two pieces of bread with a few pieces of meat, cheese and various seasonings. It is easy to eat and widely popular in western countries.