I understand your situation with regards to the packaging.
However, for MTEE, SMTC and MHI we use the same packaging and from these locations we never received any issues / remarks related to the packaging.
Especially for SMTC and MHI the shipments are also consolidated (LCL) with other products and we have not received any complaints.
I suggest MTA reaches out to the transportation company (MLEG?) and explain your concerns. It might also be an idea to provide them with a loading instruction, such as specific items are not allowed to be stacked.