  When a fluid is constrained to a fixed, finite volume, the conditions for
liquid-vapor equilibrium are different from the infinite volume or constant
pressure cases. There is even a range of densities for which no bubble can
form, and the liquid at a pressure below the bulk saturated vapor pressure
remains indefinitely stable. As fluid density in mineral inclusions is often
derived from the temperature of bubble disappearance, a correction for the
finite volume effect is required. Previous works explained these phenomena, and
proposed a numerical procedure to compute the correction for pure water in a
container completely wet by the liquid phase. Here we revisit these works, and
provide an analytic formulation valid for any fluid and including the case of
partial wetting. We introduce the Berthelot-Laplace length
$\lambda=2\gamma\kappa/3$, which combines the liquid isothermal compressibility
$\kappa$ and its surface tension $\gamma$. The quantitative effects are fully
captured by a single, non-dimensional parameter: the ratio of $\lambda$ to the
container size.
