it turns out that the 3 ounce aluminum can that's recommended for Super Cat use is just about perfect for this task.
The volume is such that the alcohol vapors pressurize properly under almost all altitude, temperature and other operating conditions. It's also large enough that, depending on hole configuration, it will hold up to 2 fluid ounces of fuel, which is usually more than enough for most cooking chores. Likewise, the can's diameter easily supports most commonly used pot sizes while maintaining a high degree of efficiency.
The aluminum walls are likewise thin enough to efficiently conduct heat to the alcohol pool to keep it boiling, but are also thick enough to safely support the weight of a full pot of water (at least of the size range most likely to be used).
Over the years, I've experimented a variety of other cans types that have been larger, smaller, and constructed from metals such as steel and brass, and I have yet to find anything that works as well as the 3 ounce aluminum can.