If you're are adventurous and have some money to play with, you might want to look into a bathtub made from mahogany, birch, or teak. Wood allows you break away from the hard-edged, somewhat sterile look of the traditional bathroom in favor of a softer, warmer, more serene setting conducive to relaxation and meditation. The wooden tubs are made from aged wood that has been dried and glued together and imbued with wax, then polished with a hard-wax oil. Because it's such a new item, we don't know how well these tubs hold up over time. Manufacturers do suggest that the bowl or tub be dried after each use and waxed semi-annually.