A system, method and computer software program on a computer readable medium for loading cloth modeling data, generating an environmental model, generating a basic cloth model, and generating sections of a cloth surface model based on the basic cloth model and the cloth modeling data. The lower cap portion includes an opening allowing fluid contents of the container to flow thererough, and a valve member is dimensioned and configured to cover the lower cap portion opening. The overhead C4 product is then fed to the second alkylation system to provide the isobutane. A holder inserter inserts second null data into second place holders within an enhanced data packet outputted from the first multiplexer.