The best way to remove condensation from a cargo container like the etrailer.com Cargo Bag # 988501 would be to use dessicant to remove the moisture in the air.
A desiccant is a hygroscopic substance that creates or maintains a state of dryness. Common desiccants include silica, activated charcoal, calcium sulfate, and calcium chloride.
This is what most freight companies will use to prevent, "container sweat," like what you are trying to do. view full answer...