No yuck. No muck. Our ECOlunchbox Solo Cube is plastic-free, lead-free, BPA-free, phthalate-free and even waste-free. Made from high-quality stainless steel, our square sandwich box is non-toxic and healthy for both people and our planet. Yum-yum. Non Leaching. The stainless steel will not retain stains, odors or residues. Independently tested lead free.