Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid vs K31001 Lunch box Lunch container 1 L Green, Transparent: which is safer?

Where these two actually differ

• We flag Silicone gasket degradation, Bacterial growth in vacuum seal and Surface corrosion under acidic conditions on the Klean Kanteen and not on the Tefal.
• We flag Monomer and oligomer migration under heat, Degradation and microparticle shedding and Bacterial growth and mold in seals and cracks on the Tefal and not on the Klean Kanteen.
• The Klean Kanteen is Stainless steel body, silicone gasket lid seal where the Tefal is Polypropylene (PP) rigid plastic container, which is most of the difference in these two grades.
• The gap is 30 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.