You have to put the stigma of saffron in a mortar and then pour it on a bottle until it is completely crushed, then pour boiling water on the powdered saffron and put a lid on it and give it time for 30 minutes, to completely open its color and fragrance, of course, if you are in a hurry, put it on indirect heat, such as a kettle or samovar, to inhale faster and better.