Just wondered does the 2 hour rule for formula still apply for a 9 month old. He doesn't always sleep through esp when teething and just wants milk, I make a few ounces up before I go to bed and it's usually wasted as it can be past the time when he wakes... I just wondered how long would you leave formula ( out of fridge) before throwing away.... just the 2 hours or longer now he's not a newborn?? X