DualSip Leakproof Insulated Water Bottle 2-Way Lid vs 20oz TKWide with Café Cap, Tofu: which is safer?

Where these two actually differ

• We flag Plastic lid and elastomer seal degradation, Bacterial or mold growth in seals and Off-gassing from plastic lids at elevated temperature on the Contigo and not on the Klean Kanteen.
• We flag Powder-coat cap degradation over time, Bacterial biofilm in cap threads and seals and Thermal stress on seals at extreme temperatures on the Klean Kanteen and not on the Contigo.
• The Contigo is Stainless steel body, plastic/elastomer lids and seals where the Klean Kanteen is Stainless steel bottle, stainless steel cap, which is most of the difference in these two grades.
• The gap is 25 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.