To begin with, 賞味期限 refers to the best-before date, not the sell-by date.
One week, huh...Is that all? Then it should be perfectly fine.It'd be a waste to throw it away!AngelThis is scary with food products that have eggs!You have to take care of yourself!DevilYour roles are reversed, aren't they?Why're you eating it!?Geh, the pudding I was about to eat is already past its best-before date.