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Bottom Line. Milk generally stays fresh for up to five days after the date on the carton, but itâs better to be safe than sorry. Note the date on the milk before you buy it, purchase the carton stamped with the latest date available and then use the date as a guideline, not a rule. Your nose is likely the best judge.
4-5 Days. Of course, all food and drink lasts for a shorter period of time if they are not stored properly. But remember that powdered milk, unlike a lot of other dairy products, usually has a best by date which is the last date by which a manufacturer will vouch for a product's quality, not its safety.