FreeSip Sway Stainless Steel vs Classic Tumbler with Straw Lid & Flip Lid Travel Mug: which is safer?

Where these two actually differ

• We flag Silicone and plastic lid/valve leachables, Bacterial growth in valve mechanism and Off-gassing or odor transfer on the Owala and not on the Simple Modern.
• We flag Polypropylene lid degradation under heat, Lid seal degradation and bacterial growth and Microplastic shedding from polypropylene straw on the Simple Modern and not on the Owala.
• The Owala is Stainless steel body, no interior coating disclosed where the Simple Modern is Stainless steel tumbler body, polypropylene lid components, which is most of the difference in these two grades.