Nitrosamines are known to be carcinogenic and have been found in nursing bottle nipples. The nitrosamine content in nursing bottle nipples was analyzed by gas chromatography-thermal energy analyzer. 36 samples including natural rubber and synthetic silicone products were analyzed. 13 samples including 3 natural rubber product and 10 silicone product met the tolerance level of 10 ppb. Silicone products have the lower nitrosamine content than natural rubber products.