Subject: Milk spoilage resultant from microwaving

Our 2-1/2 year old son insists on drinking milk hot. As a result we heat it in 
the microwave and it may take him 2 hours to consume 12oz. The question is how 
long can milk that has been microwaved can stand at room temperature without 
harmful bacterical growth. Further can microwaved milk return to the 
refridgerator and continue to be safe to drink at a later date?
Thanks.
Rebecca

Re: Milk spoilage resultant from microwaving