Comment on bag models with spontaneously broken color symmetry

A recently suggested field-theoretic bag model, where gluons are confined via a Higgs mechanism, is discussed. It is found that the proposed model creates gluon boundary conditions that break global $\mathrm{S}{\mathrm{U}}_c\mathrm{}\left(3\right)\mathrm{}$ invariance. A modified scheme that removes this anomaly is suggested. However, some severe generic problems remain. Examples are the lack of a suppression mechanism for states with open color and the large surface energy of the bag states.