Obviously I'm no expert... but I would suggest burning that one all the way down, then if it's still working out well, pour the candles for hubby's coworker plus one extra, and burn that one down too... just because you might have done something a little differently the second time you poured them. I would also warn the person and try to convince them to help you test... lol! This is assuming that you are going to be burning the same fragrance. If not, you might need to play with the new one a little.