A method of molding a multi-layer container formed from a first polymeric material and a second polymeric material wherein the multi-layer container includes a bottom forming a closed end, a sidewall extending from the periphery of the bottom to form a chamber that is generally cup shaped or u-shaped, an open end opposed to the closed end and a flange circumferentially extending from the periphery of the sidewall at the open end and having a top surface and a bottom surface, the method comprising: injecting the first polymeric material into a mold cavity configured to form the resulting multi-layer container, wherein the first polymeric material forms an interior layer of the resulting multi-layer container; injecting the second polymeric material into the mold cavity as an inner flow to form an inner layer and as an outer flow to form an outer layer of the resulting multi-layer container; and co-injecting the first polymeric material along a flow line offset from a zero velocity gradient (Vmax, 340) of a combined annular flow of the first and second polymeric materials, the flow line having a greater velocity than an average flow velocity (Vave, 360) and biased toward the outer flow, the offset of the flow line of the first polymeric material being selected to cause the first polymeric material to fold over toward the outer flow at a location of a heat sealable surface in a heat sealable zone on the top surface of the flange of the resulting multi-layer container such that the interior layer of the resulting multi-layer container has a fold over portion in the flange that is folded over and biased toward the outer layer of the flange of the resulting multi-layer container, the fold over portion of the interior layer being positioned closer to a remainder of the interior layer than the bottom surface of the flange, wherein the offset of the flow line is determined by a volumetric flow ratio of the inner flow to the outer flow of the second polymeric material and wherein the fold over portion of the interior layer toward the outer wall of the flange of the resulting multi-layer container preserves the integrity of the adhesion of the interior layer to the inner and outer layers and preserves the integrity of the adhesion of a closure with the second polymeric material of the heat-sealable surface during and after a heat sealing operation to maintain barrier coverage or scavenger coverage in the resulting multi-layer container. injecting the first polymeric material into a mold cavity configured to form the resulting multi-layer container, wherein the first polymeric material forms an interior layer of the resulting multi-layer container; injecting the second polymeric material into the mold cavity as an inner flow to form an inner layer and as an outer flow to form an outer layer of the resulting multi-layer container; and co-injecting the first polymeric material along a flow line offset from a zero velocity gradient (Vmax, 340) of a combined annular flow of the first and second polymeric materials, the flow line having a greater velocity than an average flow velocity (Vave, 360) and biased toward the outer flow, the offset of the flow line of the first polymeric material being selected to cause the first polymeric material to fold over toward the outer flow at a location of a heat sealable surface in a heat sealable zone on the top surface of the flange of the resulting multi-layer container such that the interior layer of the resulting multi-layer container has a fold over portion in the flange that is folded over and biased toward the outer layer of the flange of the resulting multi-layer container, the fold over portion of the interior layer being positioned closer to a remainder of the interior layer than the bottom surface of the flange, wherein the offset of the flow line is determined by a volumetric flow ratio of the inner flow to the outer flow of the second polymeric material and wherein the fold over portion of the interior layer toward the outer wall of the flange of the resulting multi-layer container preserves the integrity of the adhesion of the interior layer to the inner and outer layers and preserves the integrity of the adhesion of a closure with the second polymeric material of the heat-sealable surface during and after a heat sealing operation to maintain barrier coverage or scavenger coverage in the resulting multi-layer container.