Pour the pudding into ramekins with lids or into one large bowl. If the skin that can form on top creeps you out, press some plastic wrap down on top of it to keep that from happening. Or melt some butter and cover the top with that. Yeah . . . that's no good for you.
Cool until refrigerator temp and enjoy as desired.
I don't know how long it will store for. Chances are it won't be around long anyway.