Lunch Food Box vs 24 pc Rubbermaid Easy Find Lid Containers & 8 pc Stainless Container Set: which is safer?

Where these two actually differ

• We flag Bamboo fiber lid degradation or contaminant absorption, Gasket or seal material composition and Bamboo fiber formaldehyde or chemical treatment residue on the Klean Kanteen and not on the Rubbermaid.
• We flag Microplastics from container degradation, Monomer leaching from polypropylene and Lid gasket degradation and bacterial growth on the Rubbermaid and not on the Klean Kanteen.
• The Klean Kanteen is stainless steel with bamboo fiber lid where the Rubbermaid is Polypropylene plastic containers and stainless steel, which is most of the difference in these two grades.