When the cup portion is empty of {TAIL ~ the beverage}, the user can then remove {HEAD ~ the stopper} 
When the cup portion is empty of { TAIL ~ the beverage } , the user can then remove { HEAD ~ the stopper }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD