Caffeine can enter the breast milk of nursing mothers (IFIC August 2002). According to the American Academy of Pediatrics (AAP 2002), "Caffeine tends to build up in babies' systems because their bodies cannot get rid of it very easily. A morning cup of coffee is not likely to harm your baby, but too much caffeine can cause problems such as poor sleeping, nervousness, irritability, and poor feeding. Try using decaffeinated coffee and tea and avoid colas and other carbonated drinks that have added caffeine." OTIS (OTIS 2001) states that, "women should remain well hydrated with water, juice and milk while breastfeeding."