A self sealing, {HEAD ~ pressure openable, slit type valve} may be mounted in the cover at the dispensing orifice to control {TAIL ~ flow} through the orifice 
A self sealing , { HEAD ~ pressure openable , slit type valve } may be mounted in the cover at the dispensing orifice to control { TAIL ~ flow } through the orifice
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH