How long is it good for?

Jenna • Beach Mom 🏖 Disney Mom 🏰 Boy Mom👨🏻‍🦰👶🏼

I'm breastfeeding and I got a haakaa to save all of the would be wasted milk. Especially in the middle of the night, I keep falling asleep without putting the milk into the fridge; sometimes 30 minutes, others 3 hours. How long is it good for before I have to get it into the fridge. How long is too long and I have to trash it?