Storage Information: To keep cottage cheese fresh-tasting, handle with care. When buying, look for the sell by date stamped on the label. This tells you and the store manager when the cheese can no longer be sold, but not when it is no longer wholesome. Unopened containers of cottage cheese will keep in your refrigerator for up to a month after purchase. After opening, cottage cheese will stay fresh for a week to 10 days, depending on how it has been handled. Store it in the original container; use a clean spoon to remove the portion you plan to use and return the container to the refrigerator as soon as possible. If there is any sign of mold on the surface of the cheese, it is best to discard the whole container. app117a