Caffeine extracted from coffee beans to make decaf coffee is sold as crude caffeine to refiners and the pure caffeine is ultimately sold to soft drink makers like Coca Cola and Pepsi. – WTF Fun Facts
Source: https://www.npr.org/sections/thesalt/2016/02/26/467844829/inside-the-anonymous-world-of-caffeine?t=1561060551334
Fun Fact – Caffeine from decaffeinated coffee sold to soft drink makers
