Why can’t you put vacuum insulated metal drink ware into the dish washer? Like Bubba Mugs or YETI etc…They seem solid, so what am I missing that could be damanged by, I assume, the heat?
Yes. Once the air inside their insulation pocket is vacuumed out, it has to be sealed somehow. Those seals will usually warp or break from the heat of a dishwasher, and once air gets back into them then they don’t insulate any better than a regular cup would.
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