The side wall is provided with openings which permit {HEAD ~ passage therethrough} of liquid from the flask to facilitate {TAIL ~ oral medicating} thereby 
to facilitate
The side wall is provided with openings which permit { HEAD ~ passage therethrough } of liquid from the flask to facilitate { TAIL ~ oral medicating } thereby
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH