  One of the most profound aspects of the standard model of particle physics,
the mechanism of confinement binding quarks into hadrons, is not sufficiently
understood. The only known semiclassical mechanism of confinement, mediated by
chromo-electric strings in a condensate of magnetic monopoles still lacks
experimental evidence. Here we show that the infinite resistance
superinsulating state, which emerges on the insulating side of the
superconductor-insulator transition in superconducting films offers a
realization of confinement that allows for a direct experimental access. We
find that superinsulators realize a single-color version of quantum
chromodynamics and establish the mapping of quarks onto Cooper pairs. We reveal
that the mechanism of superinsulation is the linear binding of Cooper pairs
into neutral "mesons" by electric strings. Our findings offer a powerful
laboratory for exploring and testing the fundamental implications of
confinement, asymptotic freedom, and related quantum chromodynamics phenomena
via desktop experiments on superconductors.
