  In the context of extended phase space, where the negative cosmological
constant is treated as a thermodynamic pressure in the first law of black hole
thermodynamics, we find an asymptotically AdS metric whose thermodynamics
matches exactly that of the Van der Waals fluid. However, we show that as a
solution of Einstein's equations, the corresponding stress energy tensor does
not obey any of the energy conditions everywhere outside of the horizon.
