IMUSA USA R200-10WM Aluminum Mug for Stovetop Use or Camping 0.7 Quart, Silver

Would it be possible to do both; drink water and pour water out of this cup at the same time? If so, at what rate should I add water as pouring out?

I'm seeing several references to this being ~24 oz or 3 C capacity, but it's advertised as 1.25 Qt (36 oz or 5 cups). Which is it?

For msr pocket rocket stove for one which mugs size would be best?

what country is this made in?