  Many experimental results around and above the energies where the solar
modulation affects cosmic ion fluxes were quantified, conceptualized and
debated using leaky box models. These models exploit the notion of equilibrium
between creation and destruction processes of cosmic ions in an
undifferentiated arbitrary volume representing the Galaxy, ignoring the
galactic magnetic field, the size of the Galaxy, the position of the solar
cavity, the spatial distribution of the sources, the space variation of the
interstellar matter and other pertinent observations. Progress in the
measurements of the quoted observational parameters rendes obsolete the use of
the leaky box models. Specific examples substantiating the inadequacy of the
leaky box models are analyzed such as the conversion of the boron-to-carbon
flux ratio into grammage and the residence times of cosmic ions in the Galaxy.
The unphysical and misleading nature of the leaky box models is ascertained and
illustrated at very high energy.
