1. Problem: The ISO Tank Container Logistics Bottleneck ISO tank containers are the standard equipment for international liquid bulk transport, but the model creates severe logistics constraints: tank availability imbalance between export-heavy and import-heavy regions means exporters in Asia wait 3-6 weeks for tank repositioning, tank cleaning costs ($200-500 per tank between incompatible product grades) erode margins on lower-value liquid commodities, and the tank's round