Once opened, milk generally remains good for about 4 to 7 days if kept properly refrigerated. This applies to most types of milk, including whole, reduced-fat, skim, and lactose-free varieties
. Key points to ensure milk stays fresh after opening:
- Keep milk refrigerated at an optimal temperature between 34°F and 38°F (1°C to 3°C), ideally in the coldest part of the fridge, such as the back
- Ensure the container is tightly sealed to minimize exposure to bacteria and contaminants that cause spoilage
- Avoid leaving milk out at room temperature for more than two hours, as it becomes unsafe to consume beyond that point
- Use sensory checks such as smell, taste, and appearance to detect spoilage; sour odor or off flavor indicates the milk has gone bad
Different types of milk have slightly varying shelf lives after opening:
- Pasteurized fresh milk: best consumed within 3 to 7 days
- UHT (Ultra-high temperature) milk: can last up to 7 days once opened if refrigerated
- Non-dairy milk alternatives (almond, soy, oat): typically last 7 to 10 days after opening if refrigerated properly
To extend milk’s shelf life beyond this period, freezing is an option, which can preserve milk for up to three months, though it may alter texture upon thawing
. In summary, for typical dairy milk, expect about 4 to 7 days of good quality after opening when stored correctly in the refrigerator. Always rely on the milk’s sensory qualities to confirm freshness before use.
