All dishwashers are different, which is why we recommend to hand wash it for maximum life. Putting the bottle under very high temperatures, as some washing machines can do, can destroy the vacuum seal that we have. Then you will notice your bottle won’t keep your cold as long.
Either hand wash, or use our bottle brush for deep scrubbing:
This was in the care notes after I purchased mine-
To keep your stainless steel water bottle in the awesome condition, we recommend you hand wash/rinse it. We’ve tested it in dishwashers of course, but all dishwashers work differently, and ideally, we want your bottle to last forever. Dishwashers can harm the insulation