Leftover WCM - toss or keep?

[ladygrey]

Do you follow the same rules as formula or BM with WCM leftover in bottles or sippies? I feel bad dumping several ounces of milk if DD doesn't finish it, but also don't want to risk her getting sick (is the bacteria growth a real danger or just a precaution?). It seems like I can never predict how much milk she'll actually drink.

[dcn]

No . Sippy goes back in the fridge. He typically finishes it within a day.