I used to be a naysayer of the Caldera Cone from Trail Designs but after some testing, I've become a convert. Because it's an enclosed system, it is extremely efficient and since the windscreen doubles as a pot stand, it saves weight too. This is probably one of the most creative designs I've seen for an alcohol stove cooking system and I look forward to doing more testing with different models. Here's a quick look at a Caldera Cone for a Snowpeak 600 titanium mug.
I also have their titanium Ti-Tri which can be used as both an alcohol stove and a wood stove. I will be testing that soon but in the meantime, here are the specs for the cone tested in the video for the Snowpeak 600:
Windscreen Weight: 1.3 oz.
Stove Weight: 0.5 oz.
Combined Weight: 1.8 oz.