I routinely finish off the coffee at work thats been cold for 2 hrs, because I forgot to drink it quickly. Never once had trouble because of that. Went to a 3

I routinely finish off the coffee at work thats been cold for 2 hrs, because I forgot to drink it quickly. Never once had trouble because of that. Went to a 3 star hotel once that had coffee for breakfast, only tried that one once.