Evaporation of thin liquid films inside reentrant cavities occurs in several boiling processes where enhanced surfaces are utilized. In this work. evaporation from a single reentrant cavity with an additional thin channel is studied. The channel allows the backflow of liquid from the pool into the cavity during bubble growth. https://www.roneverhart.com/Claus-Porto-Cerina-Ocean-Mist-Bath-Soap-Bar/