There were several rum producers in Arecibo by the beginning of the 20th century. Most of them merged their distillery operations into a single entity, the Puerto Rico Distilling Co., which was formally incorporated on February 2, 1911. The new company eventually became the principal supplier of partially refined or final product to rum aging, blending and bottling companies in Mayagüez and Bayamón. During Prohibition the company turned into producing denatured alcohol, bay rum (up to 265 different brands of bay rum were eventually produced at the main distilling plant, including the best-selling Alcoholado Superior 70 and Alcoholado Santa Claus) and other industrial products. Rum production returned in 1934, with Ron Candado. In 1935, a joint venture with Florida Cane Products, Inc., spawned a new corporation, Ron Rico, whose flagship product was the Ronrico rum and which had considerable success selling rum in the United States. A new distilling plant was opened in 1942.