We label all our amber glass bottles with a metallic 'fine point' markers (which don't turn out to be very 'fine point' when the metallic ink starts flowing). After testing dozens, these are "the ones":
Amazon.com: Pilot Gold and Silver Metallic Permanent Markers, Extra Fine Point, Set of 2 Markers (41400): Office Products
Labels wont 'ignite' at 150 degrees, but if there's one thing we've found that true about DIYing, it's that "labels suck". You can't get them wet, they smear, rip, get dirty (get even a few drops on the label and they're a mess)...and trying to get them off bottles is sticky, gross and ruins whatever scrubby-pad you use. Sure, there may be one or two labels that are "perfect' and not so ridiculously unsuited to DIYing, but in general...no good.
Of course, you can eventually 'wear off' the metallic ink, but we find them far superior to labels in practically every way. 'Sure, it takes a bit of practice to get used to the pens and writing with them on curved glass - but it turns out overall to be FAR less hassle.
The type above? The gold will come off easily with acetone. The silver requires a scrubby (at least that's been true for the last few we used).
And we "label" our bottles before we add anything to the bottle