I suspect they are still finalizing the latest improvements in the T-L2, and without much income as yet, there may be a few more delays in getting that into production. Plus, with new barite and frack sand orders beginning to come in and, with the few number of employees, DDCC will most likely concentrate on details of filling these new orders, hiring new personnel, etc., to establish continuing shipments, even if it means using conventional shipping containers for a while longer.
JMHO, but that seems to me a logical presumption for a relatively new provider, with a new, significantly improved product.