However, exposure of newborn infants to artificial nipples has been strongly associated with breastfeeding problems [5-9]. Frequently these problems have been explained by phenomena called nipple confusion. Nipple confusion occurs when infants are exposed to two different feeding methods, bottle and breast, resulting in the infant refusing to breastfeed. Consequently, it has been recommended that bottle feeding be avoided and that cup feeding be used for the supplementation of term as well as preterm infants.