WC Ente Bluebloc In-Tank Marine

WC Ente (commonly known as Duck in English-speaking markets) is a renowned brand of liquid toilet cleaner and rim blocks, recognized by its signature 'duck-neck' shaped bottle. The brand was originally created by Walter Düring in Switzerland in 1951, revolutionary for its design that allows for easier cleaning under the rim of the toilet seat.

Today, the brand is owned by S. C. Johnson & Son, an American multinational privately held manufacturer of household cleaning supplies and other consumer chemicals. Because S. C. Johnson operates on a global scale, manufacturing of WC Ente products occurs across multiple facilities worldwide to supply regional markets, ensuring efficiency and availability. The brand remains a household name in hygiene, combining Swiss ingenuity with American corporate distribution.