The diameter of {HEAD ~ the beer keg} is smaller and spaced from {TAIL ~ the inner diameter} of the container so that the space therebetween may be packed with ice cubes or crushed ice to keep the beer keg cold 
The diameter of { HEAD ~ the beer keg } is smaller and spaced from { TAIL ~ the inner diameter } of the container so that the space therebetween may be packed with ice cubes or crushed ice to keep the beer keg cold
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH