The tube initially has one end extending through the bottom or closed end of the plastic bottle and an opposite end which is open and positioned at a predetermined distance from the discharge end of the bottle, in order to develop {HEAD ~ an effective hydrostatic pressure head} at {TAIL ~ the point} of said predetermined distance 
The tube initially has one end extending through the bottom or closed end of the plastic bottle and an opposite end which is open and positioned at a predetermined distance from the discharge end of the bottle , in order to develop { HEAD ~ an effective hydrostatic pressure head } at { TAIL ~ the point } of said predetermined distance
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH