A wall bedroom vanity is the best way to make the most of a wide master bathroom. Of course, there are a variety of great functional reasons to get a vanity like this, too. For almost the exact cost of a single vanity and sink, a bathroom vanity will actually give you two cabinets, two sinks, and two mirrors to aid efficiency in the bathroom. This setup effectively eliminates much of the common bathroom bickering over whose turn it is.
