Drop In Lavatory SinksAvailable in 17 color(s) Oceana's “masterpieces in glass include our gorgeous lavatory sinks. Available in a wide variety of colors and styles, our drop-in lavatory sinks drop into a cutout in the countertop. Drop-ins are available with or without overflows and come in standard sizes for ease of remodeling. Choose between an 8" faucet spread, a 4" faucet spread, and a one hole faucet mount. Oceana's unique “Hard Roc glass formula makes these glass lavatory sinks hygienic, easy to clean, and resistant to stains, scratches, and thermal shock.