I have had this teapot about 3 months and in this last month it has been in constant use and yesterday these stains appeared, is it rust? Should I throw away the kettle or can it be saved?
Assuming it's stainless it might be rust or it could just be dirty. Just take a scotch Brite pad and scrub it off with some elbow grease. Even if it is rust it will come off and be fine. Source: metal trades person
This isn't limescale though. The stainless surface isn't perfectly smooth already and appears to be a light brushed, though may just be spun. A kitchen scotch brite pad isn't going to increase the surface roughness any. That said, I'd use barkeepers friend for this particular issue.
Could be rust or some minerals that ended up on the bottom. Try boiling a mix of vinegar and water and see if it wipes off after. I'd keep using it anyways though, nothing to worry about.
I'm not a health expert, take this with a grain of salt. I'd be disappointed it was rusting, but also mostly shrug it off and keep using it unless it gets bad and flaky/scaley
Looks like it could be rust. Even if it it’s, that’s not really a problem. You can probably get rid of the rust by cleaning the teapot a bit better next time.
I don’t see any problem with continuing to use it in the future. If you’re worried about microbes colonizing the place, remember two things:
I find it amusing how no one points out how ridiculous it is for ops first reaction to 3 spots of brown in his brand new kettle is for him to throw it away and get a new one
If this happens and you don't have heavy duty cleaners, try making a paste with baking soda, table salt, and water. A lot of times it'll do the trick and get blemishes like this out of stainless.