So I've just finished making about a liter of hot chocolate (lets ignore why for a minute here), and I've stored it in my refrigerator, inside a plastic bottle that was once used to store orange juice. Although I cleaned and rinsed the bottle as well as I could before using it, the hot chocolate has taken on an orange-y aftertaste. It's by no means inedible, but unwelcome nonetheless.
Is there any way to remove/mask the flavor? I'd hate to have to throw all this out.