I always try to keep the quart-sized boxed of beef and chicken stocks (or broth) in the pantry. I love the fact that they have a good shelf life and can be kept on-hand until needed.
The size of the recipes I make (often cooking for two) usually don't require the use of the entire carton. The rest may sit in the 'fridge for a week or more until I have another opportunity to use it.
Should I assume that the clock starts ticking once the carton has been opened? How long can I safely use the remaining product before it should be tossed?
On a similar tangent, why doesn't anyone sell chipotles in adobo in a jar that can be reclosed? I only find it in cans, and when I only need one or two chipotles, I will end up throwing away the rest of the can! :(