

This applies to metal ones too. While they won’t shrink, they can be damaged.
I put one of my metal water bottles in and it scraped up the sides quite a bit. Definitely was only meant for hand washing. Didn’t destroy it, but kind of ruined the nice finish it had.
That’s a good point! Ever since that happened, I’ve made sure to read on the bottle/label and it’ll tell you whether they say it’s okay to dishwash or not.
Though I feel most secure hand washing. Ironic as I just washed mine today lol.