What is the correct way to store dry ingredients to prevent contamination?

Storing dry ingredients in airtight containers is essential for preventing contamination. Airtight containers help to keep out moisture, pests, and air, all of which can lead to spoilage or degradation of the ingredients. For instance, moisture can cause clumping or promote the growth of mold, while pests such as insects can infest the ingredients, compromising their safety and quality. By using airtight containers, one creates a protective barrier that ensures the ingredients remain fresh, uncontaminated, and safe for consumption.

Other methods such as storing in open boxes, at room temperature without protection, or in the refrigerator may not provide the same level of security against contamination or may even introduce new risks. For instance, an open box allows for easy entry of pests and exposure to air and moisture, and while refrigeration can be suitable for certain food items, it is generally not recommended for dry ingredients as it may introduce unwanted moisture.