For best results, do not use boiling water. Do not fill more than two-thirds of this bottle. Drive the air out carefully by placing the bottle on a table and raising the collar until you are certain that the water is completely out. Never dry the bottle near a hot iron or on a hot metal surface. When not in use, the bottle must be thoroughly emptied and drained out. Avoid contact with oil or grease. Store the bottle with the stopper on, away from direct sunlight. Keep plastic bag out of reach of children.