A smart closure , rotatably attachable to a container , comprising: a cap , the cap having a panel , a peripheral skirt extending axially away from a bottom facing of the panel and a sealing flange , plate engagement features , and a plurality of tag engagement posts all positioned on the bottom facing, said sealing flange being arranged coaxially within the skirt and said plate engagement features and plurality of tag engagement posts being arranged within an area defined by the sealing flange; a sealing plate having at least one peripheral stopper to engage a corresponding stopper formed on a container, and cap engagement features provided on a top facing, said sealing plate being sized to be received within the skirt of the cap; a wireless tag having at least one frangible appendage , said wireless tag being positioned between the cap and the plate so that the tag is carried on the engagement posts; wherein the cap and sealing plate are coupled together via the cap and plate engagement features (39 and 29) to form a closure with the wireless tag held between the cap and the sealing plate ; plate, wherein the plate engagement features of the cap include one or more axially extending ribs or projections , said axially extending ribs or projections received within a corresponding arcuate gap or slot formed on the top facing of the sealing plate forming the cap engagement features and allowing the sealing plate to rotate freely in comparison to the cap for a limited range of motion, and wherein the frangible appendage ruptures when, after the closure is initially tightened onto a container, the closure is loosened to enable the limited range of motion to sever the frangible appendage . a cap , the cap having a panel , a peripheral skirt extending axially away from a bottom facing of the panel and a sealing flange , plate engagement features , and a plurality of tag engagement posts all positioned on the bottom facing, said sealing flange being arranged coaxially within the skirt and said plate engagement features and plurality of tag engagement posts being arranged within an area defined by the sealing flange; a sealing plate having at least one peripheral stopper to engage a corresponding stopper formed on a container, and cap engagement features provided on a top facing, said sealing plate being sized to be received within the skirt of the cap; a wireless tag having at least one frangible appendage , said wireless tag being positioned between the cap and the plate so that the tag is carried on the engagement posts; wherein the cap and sealing plate are coupled together via the cap and plate engagement features (39 and 29) to form a closure with the wireless tag held between the cap and the sealing plate ; plate, wherein the plate engagement features of the cap include one or more axially extending ribs or projections , said axially extending ribs or projections received within a corresponding arcuate gap or slot formed on the top facing of the sealing plate forming the cap engagement features and allowing the sealing plate to rotate freely in comparison to the cap for a limited range of motion, and wherein the frangible appendage ruptures when, after the closure is initially tightened onto a container, the closure is loosened to enable the limited range of motion to sever the frangible appendage . <EOS>