Most likely, the manufacturer of your favorite insulated cup has placed the words "hand wash only" on the label or bottom of the cup itself and not "dishwasher safe." This means cleaning it with warm, soapy water in the sink and allowing it to dry is the only way to go.
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✅Pro-grade Technology: This insulated tumbler is made of premium food grade 18/8 stainless steel, fully resistant to oxidation and rust. The finish is
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