Ceramics major here, it’s soluble salts. Water is being aboard into the clay then as it evaporates out it pulls those different salts to the surface and they crystallize.
2026-11-12 05:25:03
32
ScowlyOwl :
I love that this is just how you introduce yourself now. 💀
2026-11-11 23:04:06
74
HadesTheGardener :
Yep that's mold, probably colonized into the pores in the clay. Not a particular health concern as long as the liquid inside is only touching the glaze, that makes an impermeable barrier. If you want to save it soak it in vinegar overnight. The vinegar will also soak into the clay and kill the mold and all the spores.
2026-11-12 02:16:15
25
Notherern :
It’s salt
2026-11-12 10:41:07
0
CounterSmell :
Who’s that cute pup! Why have lot we met him yet?
2026-11-12 00:46:37
3
Hannah 🍉 :
straight to the trash. mold loves liquid, vinegar and bleach will send it deeper into the pores of the clay.
2026-11-12 05:17:37
4
Diesel :
Yes it is. What was it used for?
2026-11-12 01:52:33
3
anonymousommlette :
I think you’ve got the right idea. It’s probably a cheap mug with a lot of porosity where stuff can get in there and grow forever. You might be able to bake it and kill it all, but there’s no way of being 100 percent sure lol
2026-11-11 23:01:48
11
C :
Its just a chia pet branded mug
2026-11-11 23:30:07
2
sham_rock20 :
why am I always first? I swear I don't have alerts set 😂💚
2026-11-11 22:58:32
1
MikesHardReviews :
Yeah, that’s almost certainly mold. A lot of forums suggest doing handwashing only, drying right you wash it, and then starting it upside down so it can fully dry. I also saw someone say you soak it in vinegar or very weak bleach solution to disinfect it. If the inside of the mug is intact and has no growth or holes, you can probably still use it.
2026-11-12 01:18:22
1
Lori :
Eeeeyuck
2026-11-12 03:26:22
1
Jonathan :
Is it soft or rough?
2026-11-11 23:05:26
0
imlikeanonion :
Asbestos. (just kidding)😏
2026-11-11 23:30:39
0
SynchroLad :
Looks like you ought to take that complaint to ✨China✨
2026-11-11 23:13:36
0
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