Ryvyr's Reflex collection of architecturally engineered glass products feature the depth, clarity and strength of tempered glass with the added dimensions of texture, color and design.Tempered glass.Blue/Copper Storm.Sink does not feature overflow.Should be installed using a mounting ring.Should be installed using a 1-1/4-inch vessel style drain without overflow.Sinks are hand-foiled and painted for artistic design.Sinks may vary in color and design.