to an u201c inner surface u201d means the surface of a layer away from the outer layer and towards the interior where the liquid is packaged an u201c inner layer u201d as used herein refers to a layer is that is not exposed the environment an exemplary inner layer is a barrier layer which provides protection to the packaged liquid for freshness and or a barrier to oxygen the sealant layer is also an inner layer an inner layer may be continuous throughout an overall sidewall structure or it may be discontinuous u2014 located only in the area of the frangible flap a u201c sealant layer u201d is one that seals to itself to form a liquid tight seal that is the sealant layer comprises a thermoplastic polymer or polymer mixture that softens when exposed to heat and returns to its original condition when cooled to room temperature a u201c sidewall u201d is a discrete piece of polymer film or multi layer laminate that is sealed to itself or another sidewall by for example welding or an adhesive to form a pouch or a bag the abuse layer may comprise any suitable polyester an exemplary polyester is an oriented polyethylene terephthalate opet in general the sealant layer may comprise any suitable thermoplastic material including but not limited too synthetic polymers such as polyesters polyamides polyolefins polystyrenes and the like thermoplastic materials may also include any synthetic polymer that are cross linked by either radiation or chemical reaction during a manufacturing or post manufacturing process operation exemplary polyolefins include polyethylene pe and polypropylene pp a layer having an ethylene vinyl alcohol u201c evoh u201d copolymer film provides oxygen barrier protection and may be suitable in an.