rough-and-ready Exhibiting vigor and vitality which, though unrefined and perhaps indelicate, is appropriate for dealing with a given situation; crudely efficient; rough in manner, but prompt and effective in action.
1 The exact answer to the question âHow long does an unopened package of sour cream last?â depends to a large extent on storage conditions â to maximize the shelf life of sour cream, keep it refrigerated at all times.  How long does unopened sour cream last after the sell-by date? Sour cream will generally keep for one to two weeks after the sell-by date on the package, assuming it has been continuously refrigerated; be sure that the temperature of your refrigerator remains at or below 40Â° Fahrenheit at all times.
For dairy foods like milk, yogurt, cottage cheese, cheeses and butter, use the expiration date to determine how long they can safely be kept in your fridge. Many dairy products like milk safely last about two to three weeks.Cheeses and soy milk may last a few months.or dairy foods like milk, yogurt, cottage cheese, cheeses and butter, use the expiration date to determine how long they can safely be kept in your fridge. Many dairy products like milk safely last about two to three weeks.