Lunch Food Box vs 24 Pc Easy Find Lid Containers & 8 Pc Stainless Container Set - New Home: 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 Plastic degradation and microplastic shedding and Lid gasket or seal degradation on the Rubbermaid and not on the Klean Kanteen.
• The Klean Kanteen is stainless steel with bamboo fiber lid where the Rubbermaid is Polypropylene and stainless steel (bare, uncoated), which is most of the difference in these two grades.