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