  According to the mean-field theory a condensed Bose-Bose mixture collapses
when the interspecies attraction becomes stronger than the geometrical average
of the intraspecies repulsions, $g_{12}^2>g_{11} g_{22}$. We show that instead
of collapsing such a mixture gets into a dilute liquid-like droplet state
stabilized by quantum fluctuations thus providing a direct manifestation of
beyond mean-field effects. We study various properties of the droplet and find,
in particular, that in a wide range of parameters its excitation spectrum lies
entirely above the particle emission threshold. The droplet thus automatically
evaporates itself to zero temperature, the property potentially interesting by
itself and from the viewpoint of sympathetic cooling of other systems.
