Never heard of putting a fish in a container for introduction..... I just pull the new fish out of QT, do a normal acclimation, and if there's aggression issues, put the aggressor into QT for a week or two to allow the new fish to establish territory...
If you don't put anything into the QT tank that has beneficial bacteria on it, then, no, there's nothing processing ammo.... you're cycling another tank. This is the very reason why I keep a small bag of biomax in my sump.... If I ever need to set up a QT, I just fill my tank with water, pull the biomax out of my sump & drop it into my HOB
filter, I already have a heater pre-set to temp.... plug everything in and I have a QT tank up & running in about 15 minutes.