The Conch of Shower Soap Dish
In the book Lord of the Flies by William Golding, the marooned boys organize around a conch. When blown, the kids came together and only the boy with the conch was allowed to speak. The conch represented power.
Similarly, when on the couch, the TV remote is the conch and whomever holds it wields the power. However, in the bathroom, the one who holds the soap has the power...the power to shower.
In true rugged symbolism, give your soap a cast iron throne that truly represents the power of good soap.