this post was submitted on 10 Aug 2024
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Tiny spots & rust in titanium cup (old.reddit.com)
submitted 8 months ago by [email protected] to c/[email protected]
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The original was posted on /r/Ultralight by /u/quainte on 2024-08-08 14:52:57+00:00.

Hi guys, so I have a SOTO Thermostack which I use to make coffee. I've used the 400mL titanium cup to only boil water. And I start noticing that there are some spots appears at the bottom of the cup. Then stupidly I tried to heat the cup (empty), and it started to change to brownish color.

  1. Do you guys know what might be those tiny spots?
  2. Why does the cup change color to brown? Is it rust? Will it still be safe to use?

Thank you!

Sorry for my bad english

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