All packages containing any goods, wares, or merchandise manufactured, produced, or mined wholly or in part by convicts or prisoners, except convicts or prisoners on parole or probation, or in any penal or reformatory institution, when shipped or transported in interstate or foreign commerce shall be plainly and clearly marked, so that the name and address of the shipper, the name and address of the consignee, the nature of the contents, and the name and location of the penal or reformatory institution where produced wholly or in part may be readily ascertained on an inspection of the outside of such package.