ASTpack Flexitank DesignAlways staying ahead The ASTpack Composite Bolted Design Flexitank/Flexibag converts a standard 20ft sea container into a 24ton bulk liquid transportation system. This food and pharmaceutical grade flexitank is suitable for the carriage of most types of non-hazardous liquids. The ASTpack Composite Design Flexitank/Flexi tank is constructed of three independent food-grade 3-ply co-extruded PE tubes and a rugged, abrasion resistant outer woven PP protection. It is capable of shipping up to 24,000 liters of bulk liquid.