In this paper, the results of the metallographic investigation and provenance study from three copper bottles excavated at Mansu-ri site in Cheongwon are presented. ICPS, metallography and SEM-EDS were used in order to assessthe production technology, and lead isotope analysis was used to infer the possible provenance of the copper bottles. The compositional analysis of the samples shows three main elements: Cu (67.83-74.89%), Sn (7.68-10.17%) and Pb (5.21-10.86%). In addition, optical examinations revealed two main phases: an -phase and a partial +β phase. The metallic phase is clearly indicative of a casting process without any heat treatment or cold working. Various non-metallic inclusions are observed, including Pb, S (Sulfur) and Fe. It appears that Pb was intentionally added to facilitate the casting process. On the other hand, S and Fe were included by accident in the melting process of copper ore. It appears that chalcopyrite or bornite was used as ore. The lead isotope ratios of the samples were compared with the existing data, and the results suggest that copper bottle no. 1 and no. 2 may have come from the southern part of Mainland China. Copper bottle no. 3, on the other hand, did not fall into any discrete field. It may be suggested that the accumulation of such results from the scientific analysis of copper artifacts will provide a basis for the systematic understanding of the Bronze Culture of the Korean peninsula.