Bulb Baster refers to a kitchen utensil that assists with basting, which is a method of moistening food during the cooking process. Basting is usually used when cooking meat. The head of the Bulb Baster is squeezed, creating a partial vacuum, and then the stem is inserted into the juices at the bottom of the pan. When the pressure is released on the bulb, the juices are drawn into the stem so they can be transferred over and around the meat, adding flavor and creating a glaze.