Keeping our packed lunches safe from spoiling is a very important thing. The most interesting thing I found was modern research on foods with naturally antibacterial properties, which starts to explain traditional wisdom about food spoilage around the world. There are

four main methods to keep your packed lunch safe:
1 Incorporate food and products with antibacterial properties
2 Keep it clean: Dont introduce bacteria into the lunch when packing
3 Keep hot foods hot and cold foods cold, using thermal jars and cold packs
4 Pack less perishable foods, especially in the summer

    *Extra precautions for hot weather
    *Handy foods for hot weather
    *Ways to make dishes less perishable