What type of containers must food be stored in to prevent contamination?

Food must be stored in vermin-proof containers to effectively prevent contamination from pests such as insects and rodents. These types of containers are designed to be airtight and have secure lids, making it difficult for vermin to access the food, thereby reducing the risk of foodborne illnesses that can occur from contamination.

Vermin-proof containers are particularly important in environments where food is stored for extended periods, as they not only protect the food from pests but also serve to maintain its quality and safety. In contrast, the other options may not offer the same level of protection. For instance, while plastic bags and cardboard boxes can be used for food storage, they may not provide a sufficient barrier against pests or environmental factors, thereby increasing the risk of contamination. Glass jars can be a good option for some types of food storage, but they may also not be completely vermin-proof unless they have secure lids.

Therefore, utilizing vermin-proof containers is essential for safeguarding food against contamination and ensuring food safety standards are met.