A feedblock comprising: a first packet creator (56, 156, 256, 356) configured to independently generate a first packet, the first packet including a first plurality of polymeric layers, the first plurality of layers including at least four first individual polymeric layers; a second packet creator (58, 158, 258, 358) configured to independently generate a second packet, the second packet including a second plurality of polymeric layers, the second plurality of layers including at least four second individual polymeric layers, wherein the first packet creator (56, 156, 256, 356) is configured such that the first individual polymeric layers are formed at approximately the same time as one another, and the second packet creator (58, 158, 258, 358) is configured such that the second individual polymeric layers are formed at approximately the same time as one another; and a packet combiner (54, 154, 254, 354) configured to combine the first and second packets, the packet combiner comprising: a first channel that receives the first packet from the first packet creator (56, 156, 256, 356); and a second channel that receives the second packet from the second packet creator (58, 158, 258, 358), wherein the first channel and the second channel are configured to combine the first and second packets to form a multilayer stream including the first plurality of polymeric layers and second plurality of polymeric layers, characterized in that the first packet creator (56, 156, 256, 356) includes a first plurality of flow channels (60, 160, 260, 360), a first plurality of conduits (64, 164, 264, 364), a first plurality of slots, and a first compression section all in fluid communication with each other and configured to generate the first packet having the first plurality of polymeric layers, and in that the second packet creator (58, 158, 258, 358) includes a second plurality of flow channels (62, 162, 262, 362), a second plurality of conduits (66, 166, 266, 366), a second plurality of slots, and a second compression section all in fluid communication with each other and configured to generate the second packet having the second plurality of polymeric layers, wherein the first plurality of flow channels are separate and distinct from the second plurality of flow channels, and the first plurality of conduits are separate and distinct from the second plurality of conduits. a first packet creator (56, 156, 256, 356) configured to independently generate a first packet, the first packet including a first plurality of polymeric layers, the first plurality of layers including at least four first individual polymeric layers; a second packet creator (58, 158, 258, 358) configured to independently generate a second packet, the second packet including a second plurality of polymeric layers, the second plurality of layers including at least four second individual polymeric layers, wherein the first packet creator (56, 156, 256, 356) is configured such that the first individual polymeric layers are formed at approximately the same time as one another, and the second packet creator (58, 158, 258, 358) is configured such that the second individual polymeric layers are formed at approximately the same time as one another; and a packet combiner (54, 154, 254, 354) configured to combine the first and second packets, the packet combiner comprising: a first channel that receives the first packet from the first packet creator (56, 156, 256, 356); and a second channel that receives the second packet from the second packet creator (58, 158, 258, 358), a first channel that receives the first packet from the first packet creator (56, 156, 256, 356); and a second channel that receives the second packet from the second packet creator (58, 158, 258, 358), wherein the first channel and the second channel are configured to combine the first and second packets to form a multilayer stream including the first plurality of polymeric layers and second plurality of polymeric layers, characterized in that the first packet creator (56, 156, 256, 356) includes a first plurality of flow channels (60, 160, 260, 360), a first plurality of conduits (64, 164, 264, 364), a first plurality of slots, and a first compression section all in fluid communication with each other and configured to generate the first packet having the first plurality of polymeric layers, and in that the second packet creator (58, 158, 258, 358) includes a second plurality of flow channels (62, 162, 262, 362), a second plurality of conduits (66, 166, 266, 366), a second plurality of slots, and a second compression section all in fluid communication with each other and configured to generate the second packet having the second plurality of polymeric layers, wherein the first plurality of flow channels are separate and distinct from the second plurality of flow channels, and the first plurality of conduits are separate and distinct from the second plurality of conduits.