Closure system with barrier layer

A closure system for containers of foodstuffs, the system comprising:

• a spout, the spout comprising a conduit and a seal member, the conduit arranged about an imaginary axis and the seal member having one or more surfaces configured to be secured to a container, wherein the conduit comprises conduit threading disposed on an inner circumferential surface of the conduit;
• and
• a cap having an inner circumferential surface, the inner circumferential surface arranged to encompass the conduit, the cap comprising a first discrete layer of thermoplastic resin and a first discrete layer of barrier material, wherein the first discrete layer of barrier material is surrounded by the first discrete layer of thermoplastic resin, wherein the cap has a protrusion extending in a first direction, wherein the protrusion is arranged to substantially fill an inner volume of the conduit, wherein the protrusion comprises at least a portion of the first discrete layer of barrier material, wherein an upper section of the protrusion includes first cap threading configured to engage with the conduit threading of the conduit, wherein the at least a portion of the first discrete layer of barrier material extends throughout and within the cap threading such that the first discrete layer of barrier material has thicker portions inside of the cap threading than outside of the cap threading;
• wherein the conduit comprises a second discrete layer of thermoplastic resin and a second discrete layer of barrier material, and wherein the second discrete layer of barrier material is vertically disposed throughout a length of the conduit surrounded by the seal member,
• wherein the seal member comprises a third discrete layer of thermoplastic resin and a third discrete layer of barrier material, and wherein the third discrete layer of barrier material is disposed within the seal member, wherein the one or more surfaces of the seal member comprise one or more laterally disposed grooves arranged concentrically with the conduit about the imaginary axis and configured to be secured to the container.