2 ways that can make it possible - Magnetic Impulsion + Newton 3rd law of Motion or the same view with the support of toughen glass in a truncated cone.
The Waterfall sink: the structure facilitates the user with a slope of 40 degree for water to flow down giving a sense of mini waterfall. The pipelines for cold and hot water are separated on left and right side respectively which creates a possibility to have luke warm water.
