A friend had one of these in her kitchen, and we loved using it so much we tried to find one ourself. No luck. Nowhere in town and nowhere on the web could be come up with anything. This past weekend we visited friends, who had just bought a new house and the previous owner had left these in all the bathrooms. The brand name was right on the top: Pro Ven Di.
Google turned up one good source: Dibor: French Style for the Home, which is British and makes good use of the word "clever."
This soap holder and hook is such a clever idea, you will be reminded of how useful it is every time you use it. Available in white, citron yellow or natural olive.