Thanks. As a firefighter, I've smelled enough burning plastic to last me for a while, so I tried the bending method instead.

Bent it completely back on itself and it turned white and didn't break. so ABS.

As a side question, the PLA I have doesn't take well to bending. I tried bending some PLA back on itself and it breaks at around a 90 degree bend. Is ABS that much more flexible than PLA, or is my PLA just brittle?