  Vortons can be viewed as (flat space-) field theory analogs of black rings in
general relativity. They are made from loops of vortices, being sustained
against collapse by the centrifugal force. In this work we discuss such
configurations in the global version of Witten's U(1)xU(1) theory. We first
consider solutions in a flat spacetime background and show their
non-uniqueness. The inclusion of gravity leads to new features. In particular,
an ergoregion can occur. Also, similar to boson stars, we show that the vortons
exist only in a limited frequency range. The coupling to gravity gives rise to
a spiral-like frequency dependence of the mass and charge. New solutions of the
model describing 'semitopological vortons' and 'di-vortons' are also discussed.
