MTI Whirlpools. The Alissa lavatory sink is designed to mimic the Alissa tub, part of the high-end Boutique collection of solid-surface products. Alissa features a minimalist design and is constructed of the maker’s Engineered Solid Surface material,a composite of ground minerals and binding agents. ESS is nonporous, and stain-, mold-, and mildew-resistant. The sink measures 135/8 inches long, 213/8 inches wide, and 41/8 inches deep, and comes in white, biscuit, or black. 800.783.8827.