This glass vessel sink from Eden Bath is made of high quality tempered glass. It features a pattern that circles around the sides of the side and ripples along the bottom the sink. Eden Bath specializes in unique glass vessel sinks that you won't find anywhere else. Many glass sinks feature hand painted finishes embedded in the glass which can not be compared to your run of the mill glass vessel sink. We recommend that you also purchase a drain with your glass sink in the same finish of your faucet. As this sink has a relatively flat bottom, it can be installed with or without a mounting ring. PLEASE NOTE: the bottom of this sink is relatively flat compared to round bowl vessel sinks, but it does not sit completely flat on a counter. It has a small slope toward the drain on the outside, which almost gives the sink the appearance of floating on a vanity.