Modular bathrooms; Modular non-metallic structures; Modular portable building structures (non-metallic); Modular portable building units of non-metallic materials for construction into relocatable buildings; Modular prefabricated building units of non-metallic materials for the construction of buildings; Non-metallic modular building units; Non-metallic modular portable buildings; Non-metallic modular shelters; Prefabricated relocatable buildings (non-metallic) constructed in modular units; Space frame modular units, not of metal