I aimed at 500ml/2cups, which is useful for most of my cooking. 1 cup is much easier. Wider pots are much better. The SnowPeak bowl is 5-1/4" diameter at the top, where the 700 is 4".
I did make one from a Vienna Sausage can, which is the same diameter as the cat food cans and nearly twice as tall, so it can hold a lot of fuel, but there are issues with warm up and . The physics of this design is tricky--- using a steel can doesn't work as well, etc.
My aim was to make a quick and dirty stove for a hot drink, and as others mentioned, you don't need a full boil for that.
I did try it with a Ti Sierra Cup and that was okay. The flare on the sides of the cup was an interesting mix with the flame pattern.
I'm thinking the White Box side jet rig is better suited to what I want. Esbit will work too, especially for occasional use, with the usual smell/soot/cost factors.