Unopened champagne can be kept for a long time, like 10 years or so.
shelf life of unopened Martini & rossi champagne
An unopened bottle of champagne's shelf life is infinite. Champagne actually gets better the longer it stays sealed which is why a yr1954 bottle can cost more than triple the amount of a yr2000 bottle.
Several years, but who can leave it unopened that long?
An unopened bottle of Amaretto, due to its high alcohol content, has an unlimited shelf life. It lasts forever.
The shelf life of Chloramphenicol when it is unopened is 24 months. The shelf life when it's opened is 28 days.
An unopened ricotta cheese has a shelf-life of 3 to 4-weeks, and is stamped with a use-by date on the carton. After opening, the ricotta shelf-life is 2 to 3-weeks. Keep refrigerated and covered tightly after opening.
2 to 4 months unopened and 1 month opened
Up to 2 years.
The shelf life of unopened petroleum jelly is around 3 years.
Unopened, Mozzarella cheese may be good for a month or more.