enclosing a plurality of {HEAD ~ flexible, elastic, liquid impervious packets} containing {TAIL ~ a thermoresponsive mixture} with one of the packets individually and snugly enclosed within one of the chambers 
containing
enclosing a plurality of { HEAD ~ flexible , elastic , liquid impervious packets } containing { TAIL ~ a thermoresponsive mixture } with one of the packets individually and snugly enclosed within one of the chambers
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH