I posted this as a review, but thought it also relevant to this thread. Copied here..
Using a Caldera cone is a convenient way to integrate a pot holder with a windscreen when using an alcohol burner. Now that I have these, I doubt I will ever cook over alcohol without it again.
Previous to getting my caldera cones, heating water with alcohol was inconvenient and wasteful for me. There were too many components, and too much heat loss with my amateurish windscreens. None of the common windscreen designes using mesh, wires, bicycle spokes, tent stakes, etc appealed to my asthetics. Setup and takedown was also not comparable to the convenience of my jetboil; the industry standard in 'human factors engineering' for stoves, IMO.
Now that I own a caldera, I can actually consider using alcohol again. I have only three stove components, my pot, the caldera cone, and an alcohol burner of my choice. Not a bunch of fragile screens, holders, wire mesh supports, grips, etc..
Regarding choice of burner, my first choice is to reach for my Trangia because of its bombproof durability, but if you are more careful than I; the TD included stove is probably just as efficient, and much lighter.
Setup with the Caldera literally takes seconds, just like with a Jetboil. You curve the stove, insert the tabs, light your burner, then drop the Caldera and pot on top. 5 minutes later 600ml of water is boiling. It is probably obvious by looking at it, but the design of the cone traps the hot air as it chimneys up the bottom and sides of the pot, transferring more heat to that pot than an open-top windscreen could do.
I am sort of ashamed to admit this, but another reason I like the Caldera is that it doesn't look like I made it from kitchen aluminum foil and old beer cans. I know, MYOG gurus would get upset at that comment, but I mean no offense. With the pot in place and steam rising out, it looks like a well engineered and precicely manufactured industrial product- which it is, just made in small quantities.
I bought Caldera cones sized for the Snowpeak 600 and 1400ml pots. At that time there was no cone for my SP 900ml, but word is they will soon offer one. That would be the optimum size for preparing water for one meal and one drink for a solo hiker, or two meals for a couple. I intend on buying the 900ml version as soon as it is ready. They might have a cone for your favorite pot, email them to find out.
There is no end user support needed once the product is bought, but I'm on a first name basis with Russ and George due to the friendly and timely replies to my ignorant beginner-type questions and comments. These guys they really want to hear feedback, and improve these products, even though it is not their full time job. For example, they are working on an improved tab system to join the edges of the cones.
Bottom line.. The Caldera cone makes alcohol cooking convenient, efficient, and dare I say, attractive. I doubt I will ever use an alcohol stove without a cone again. Buy one for your favorite pot; you will be glad you did.
http://www.traildesigns.com/products01.html