Ron Centenario are a line of rums produced in Costa Rica made from sugar cane juice as opposed to molasses. This would make it a kind of rhum agricole French style of rum or perhaps a Brazilian cachaca style of rum. Centenario 30yr Edicion Limitada is their premium expression aged in the solera method, which calls for retaining a portion of the oldest barrel (in this case, 30 years) and blending with the next oldest barrel.