A "tincture" is something that is made by combining flowers or herbs with alcohol. The alcohol basically pulls the essence of the herb or flower into its solution and "suspends" it there to use at a later time. Tinctures can sometimes be purchased readymade from health food stores. I hope you enjoy this one. It's from the book 'The Good Earth Bath, Beauty & Health Book' by Casey Kellar. The approx. shelf life of this is 1 year. The number of servings is a guess.