The shelf life of food storage containers is not a fixed value, but is determined by the material of the container, its sealing performance, and the characteristics of the food components. Only through scientific matching can the freshness of food be maximized.
Glass containers are suitable for high-risk components. High borosilicate glass boxes can withstand a temperature difference of -20℃ to 120℃. Raw meat can be kept fresh for 2 - 3 days after refrigeration, and the shelf life of frozen seafood can be extended by 1 week. Its transparent property makes it easy to observe the condition of the food. The silicone sealing ring ensures no leakage when inverted, avoiding cross-contamination.
Plastic containers are mainly used for storage at room temperature. PP material boxes are suitable for storing bread and grains. After sealing, they can be stored at room temperature for 5 - 7 days, which is 3 days longer than when opened. PE food storage containers are flexible and suitable for storing fruits and vegetables. Strawberries, blueberries, and other berries can be stored in the refrigerator for 2 - 3 days, but 10% of the space should be left to avoid squeezing and rotting.
Stainless steel containers are mainly designed for long-term storage. The metal preservation technology of 304 stainless steel boxes enables cooked food to be refrigerated for up to 4 days, which is 1 day longer than plastic boxes. They are also resistant to acid and alkali corrosion and do not absorb odors when storing pickled vegetables and pickled foods. They are suitable for frequent use in Chinese kitchens.
Special ingredients require special selection. Liquids like soup can be stored in glass jars with vent valves and kept in the refrigerator for 3 days. Oils and fats, such as chili oil, should be stored in ceramic inner containers away from light. At room temperature, the shelf life can be extended to one month. It is recommended to repackage cooked food in small capacity boxes of 100 - 200ml to reduce spoilage caused by repeated opening.
There are some practical tips to extend the freshness of food: Before using the container, rinse it with boiling water to disinfect. Let the food cool to room temperature before sealing. Keep a distance of 5cm from the refrigerator wall when refrigerating. Regularly replace the aging sealing ring (it is recommended to replace it every 6 - 8 months) to ensure that the sealing performance does not decline. Scientific use of food storage containers can not only reduce food waste but also ensure the safety of family meals.
