Blowing out a candle produces soot and smoke, which is not cool. You also risk blowing droplets of hot liquid wax in the surrounding area.
TIP: the best (actually it should be the only!!) way to put out a candle is to use a candle snuffer as it puts the flame out by depriving it of oxygen.
With your Litwickscandle, you only need to put the lid on top of your container, easy!