[header] How to store wet cat food [title] Put the unused food in an airtight container. [step] If you did not use all of the food in the packaging, put it into an airtight container immediately after opening it. Do not leave the food exposed to room temperature air for any amount of time. 
A plastic container with an airtight lid or a zip lock plastic bag is okay to use. [title] Discard opened food after 4 hours.