2. Hygienic requirements: Food should be stored in a hygienic and pollution-free environment to avoid food deterioration, pollution or damage by pests.
3. Labeling requirements: The stored food should be marked with storage time, expiration date and other corresponding information to avoid food safety problems caused by too long or expired storage time.
4. A food storage device can provide 3-5 compartments, which can be increased or decreased as needed.