Michael Bloomberg had a $13,000 bespoke bathtub made of hammered copper by French artisans in Villedieu-les-Poëles near Mont Saint Michel, the only place with the skills to make such a thing. Copper conducts heat very well so it takes the temperature of water immediately. No cold bathtub walls for Michael. Compared to the $8K mass-produced toilet, it almost seems like a bargain now.