Wirth-Salander and interior designer Margot Marston created this sink together to coordinate with the Cowtan & Tout wallpaper in a client’s bathroom. Margot Pyne Marston, Inc. Interiors, Stonington and Southport, (860) 535-0814, margotmarston.com, and Wirth-Salander, Wilton, (203) 544-1084, wirthsalander.com.