Depends. I had one go bad on me and I dont think I had it a full week yet. But you can smell if it goes bad, you arent going to accidentally drink it. I keep mine in a glass jar so it doesnt dry out.
MTA: although this can of ccmilk was weird from the get go. Usually I can shake shake shake the can or the jar and get the cream to mix in and this time I had nearly solid cream for 1/2 the can that would not mix at all....
MTA: because it is rare I dont have more to say
"When I got too tired to run anymore I just pretended I wasnt tired and kept running anyway" - my daughter Age 7