They should have an expiration date printed on each package. That is usually about two years unless they were exposed to excessive heat. If you're not sure you should buy a new one; the risk is much higher then the cost.
Checks are typically valid for six months before they expire.
Chocolate chips are typically good for about 1-2 years before they expire, as long as they are stored in a cool, dry place.
Bread crumbs typically last for about 6 months before they expire.
Kegs are typically good for about 6-8 weeks before they expire, depending on the type of beer and how it is stored.
Krispy Kreme donuts are typically good for about 1-2 days before they expire.
Rice Krispies are typically good for about 6-8 months before they expire, as long as they are stored in a cool, dry place and the packaging is unopened.
Kegs typically stay good for about 6-8 weeks before they expire, depending on the type of beer and how it is stored.
HelloFresh meals are typically good for about 5-7 days before they expire, depending on the specific ingredients and recipes.
Dried herbs are generally good for about 1-3 years before they expire, depending on the type of herb and how they are stored.
Sunflower seeds are typically good for up to one year before they expire if stored in a cool, dry place.
Cooked noodles can typically be stored in the fridge for 3-5 days before they expire.
CO2 cartridges typically have a shelf life of 3-5 years before they expire.