Unlike the other two posters IMO that is what the measuring spout is for to dispense the correct amount of powder. I have spouts that measure 35, 70, 80, 90 and 100 grains of powder.
The valve is shut so there is no need to pour it into another container to pour it down the barrel. But there are precautions you need to take.
If you plan on loading immediately after firing a round you can force air down the barrel to burn off any hot embers. You see guys blowing directly into the barrel. This is a common practice but not very safe and is frowned upon my many range officers which may result in a stern warning or removal from the range. It is much better to carry a foot or so of about 3/8" flexible tubing so you can place one end into the muzzle and the other into your mouth and blow into it. This serves the same purpose.