An undermount sink is a type of sink that is installed beneath the countertop, creating a seamless look. This design allows the countertop material, such as granite or quartz, to extend over the edges of the sink, making it easier to wipe spills directly into the sink without any obstructions. Undermount sinks are popular in modern kitchens and bathrooms due to their sleek appearance and practicality. They are typically made from materials like stainless steel or ceramic, and their installation requires precise measurements to ensure a proper fit. This type of sink is often paired with solid surface countertops for a cohesive design.