Wikipedia
Ty-D-Bol
Ty-D-Bol, an American brand of toilet cleaner, was introduced in 1958. In its original format, the product is a blue cleanser/disinfectant liquid released into the toilet tank from an automatic dispenser.
The brand has changed owners repeatedly; Willert Home Products of Saint Louis, Missouri, which acquired the brand in 2010, currently manufactures Ty-D-Bol in South St. Louis.
The company is best known for its nautical spokesperson, the Ty-D-Bol Man, who piloted a boat inside the toilet tank in TV commercials from 1968 to 1984.