(edited to fix pic resolution)
My cups were waiting for me this afternoon. Fast delivery! Initial impression is that they're pretty cheap, but they were also very inexpensive, so it's about what I expected. Weight is 3.2 oz, very thin walled, and the "weld" on the handle looks like I could pop it off if I tried. Still, I really like them at first glance.
The MSR 8oz fuel canister *just* fits in the cup. It's actually a perfect fit, maybe too much so, as a little bending in the cup walls or rim might make it not fit. For use as a pot, handle durability might be an issue, but we'll see. Hopefully I'll get some time to play with it on a supercat soon. The bottom is perfectly flat, so it should seal well.