Short black rubber nipples which slip over the neck of the bottles should be selected. They should be of such a shape that they can easily be turned inside out; a nipple turner costs little, and is well worth the price. Nipples should be discarded when they become soft or when the opening grows so large that the milk runs in a stream rather than drop by drop. As soon as the baby has finished his meal, the bottle should be removed from his mouth, rinsed in clear hot water, and left standing filled with cold water until a convenient time for boiling all the bottles to be used during the next 24 hours. Sufficient time must be allowed for the bottles to cool thoroughly between the time when they are boiled and the time when they are refilled. When it is time to boil the bottles they should be placed in an agate or other suitable kettle, covered with water, and boiled vigorously for three minutes. A cloth placed in the bottom of the kettle will help to prevent the bottles from breaking. After the bottles have been removed from the boiling water, they should be stoppered at once, either with rubber stoppers or plugs of sterile cotton. The stoppers, if used, should be boiled with the bottles; sterile cotton may be purchased by the package. An easy and satisfactory method to care for rubber nipples is the following: Provide as many nipples as the number of feedings given in 24 hours, and another, if desired, to be used in case of accident; provide also two cups of ordinary white enamel, each one large enough to hold all the nipples at once. One cup should have a cover; the other should not. To avoid mistakes it is well to have the cups different in shape. As soon as each feeding is finished the nipple should be thoroughly cleansed under running water by scrubbing it inside and out with a nipple brush. The nipple thus cleansed is placed in the cup without a cover. When all the nipples have been used, cleansed, and collected in the uncovered cup, they are transferred into the other cup; water is added, the cup is covered and its contents are boiled for three minutes. The nipples remain covered in the boiled water until needed; they are removed one by one for the successive feedings. Care must be used in removing a nipple to take it by the rim, not to touch other nipples during the process and not to dip the fingers into the water. The best way is to remove them by means of a glass rod, which is boiled with the nipples and kept with them in the cup when not in use. There are several advantages of this method of caring for nipples: it is easy; it reduces to a minimum the necessary handling of the nipples after boiling; and it reduces the probability of using the wrong nipple, since boiled nipples are always in one kind of receptacle and used nipples in another. It also prevents the too common practice of continuing to keep nipples in a supposedly antiseptic solution long after the solution has become badly soiled.