As shown in FIG 4, {HEAD ~ a weakened portion} 45 is preferably formed in {TAIL ~ the middle} of the internal seal 43 to cause the seal to rupture when pressure is applied to the exterior of the second compartment 42 
is preferably formed in
As shown in FIG 4 , { HEAD ~ a weakened portion } 45 is preferably formed in { TAIL ~ the middle } of the internal seal 43 to cause the seal to rupture when pressure is applied to the exterior of the second compartment 42
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL 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