Yep, they do say this, but i think a big part of the concern is the finish/pattern on the outside of the bottle, which I don’t care about (and honestly 15 years of use has damaged mine much more than any scuffing from washing)

Personally I won’t buy or keep a kitchen product if it can’t make it through the dishwasher. So while it might be my particular bottle’s survivor bias speaking, it hasn’t been a problem. Do keep the plastic bits on the top rack tho.

You want a zojirushi, maybe this one. I’ve had a very similar one for about 15 years. The bottom goes into the bottom of the dishwasher and the top goes into the top almost every night. Cold drinks stay cold all day, ice cubes don’t melt all the way, and hot drinks stay so hot you have to remember to be careful even in the evening. The model I have has very few parts (2 plastic top parts, 2 gaskets and the bottom. I’ve replaced the gasket once about 5 years ago.

There are groups of designers who have the job of making symbols and systems that can survive for an extremely long time. One of their tasks was to design “signage” that might let generations thousands of years in the future not go poking around in nuclear waste yards. But the more crazy deadly and dangerous you make an artifact look, the more those future scientists are going to want to get into them.

This is not a place of honor