Saffron is available as threads (dried stigmas taken from the saffron crocus) and as a powdered form. Red Saffron is the best quality while lower quality Saffron is also available harvested as threads from the "style" of the Saffron flower, which lacks the flavor contained in the red threads. It is always best to buy this spice as threads, since Saffron sold as powder may contain other ingredients, thus lacking in flavor. If stored in an opaque container, tightly sealed and kept out of direct sunlight, it will keep for approximately ten years. If stored in a freezer, the threads become brittle, so they are easy to crush with your fingers and can be added easily to the food being prepared.