This bathroom sink was designed with a transparent glass bottom
Coastal Bathroom Sinks | Frosted Glass, Clam Shell, Fish & more
ANZZI Mosaic Modern Tempered Glass Vessel Bowl Sink in Blue/Gold Mosaic Finish | Top Mount Installation Bathroom Sinks above Counter | Round Vanity Countertop Sink Bowl | LS-AZ198 - - Amazon.com
625 Clear Glass Vessel Bathroom Sink
VIGO Vessel sink Sheer Black Glass Vessel Round Modern Bathroom Sink with Faucet and Drain Included (16.5-in x 16.5-in) in the Bathroom Sinks department at Lowes.com
601-Crystal Glass Vessel Sink
Hand Made Slump Glass Powder Room/Bathroom Sink by Symmetree Design | CustomMade.com