From the website:
DoesItGoBad.com is a place where you can find information about when (or if) a particular product will expire or will be unfit for consumption. If you have a product and you can’t use it in a couple of days, or simply you don’t know when it’ll go bad, DoesItGoBad.com is the place where you’ll get the information you need.
http://www.doesitgobad.com/