A package includes a container having a neck finish, and a closure having a plastic shell with a skirt externally secured to the container neck finish. A seal disk includes a metal layer on a plastic substrate. The periphery of the plastic substrate is sealingly secured to the neck finish of the container. The metal layer includes a circumferentially continuous outer periphery overlying the periphery of the plastic substrate and an inner portion structured as an rf antenna. An RFID tag is electrically connected at least to the inner portion of the metal layer. A liner disk may be disposed between the closure and the seal disk separate from the seal disk. The closure skirt may have an internal bead to engage the periphery of the liner disk and lift the liner disk off of the neck finish upon removal of the closure from the container neck finish.