Nice set-up you got there.
I have played with "UL" set-ups with cook systems in the past. My lightest one comes to 2.2 oz, not counting my cup, lighter or spoon. Here are those items:
Heine Cook Pot With Lid: 1 oz
Ti Folding Esbit Stove: 0.5 oz
Windscreen with Paperclip: 0.6 oz
ZPacks CF Stuff Sack: 0.1 oz
Here is a video I did on it:
Of course, like I said, this does not include a lighter/fire steel or my spoon either. If I were to add in those weights:
Mini Bic: 0.4 oz
Ti Long handle Spoon: 0.5 oz
So, now this brings my weight up to 3.1 oz, which is still not too bad.
If I wanted to bring a cup I would bring my REI Campware cup which is another 1.8 oz...so now I would be up to 4.8 oz, which is still not completely bad, but it is starting to get up there...close to a point where I think about things...
As far as cooking in aluminum, that is not so much a concern for me when using these beer can pots as much as what is being leeched out of the plastic that separates the water from the aluminum. I have not done a whole lot of research into it, and when i say this, I have not found any official literature, nor do I know if any exists...all I know is that I have heard others talk about and mention in public forums that it is not a good thing. And this does make me wonder...is it good for me?
I have a few Heine cans which I have not used exclusively. I sent in one to Tinny a while back and let him turn it into a DBC for me. it is an awesome looking can, but it is heavier than I would like so it has really turned into a keepsake kinda thing since these cans are not available anymore...I have used it a handful of times to boil water, but that is it.
I have used a few of the Fosters cans though. I bought the rings from both Tinny and Smokeeater908 so I could buy my own beer can, cut it to the size I would like and then install the ring. (IMO, if you are going to use beer cans for your primary cook pots, these rings are the way to go since they can be removed and re-installed for only the cost of another beer can. The down side is that they do add more weight, but not much.)
Since I have started using the Foster's cans (not too long ago) I have had to replace 3 of them because the lining keeps bubbling up in the bottom corners. I am not sure why they are bubbling up so quickly though. I have used either a Mini Atomic, a knock-off Mini Atomic that I made (and actually works better and weighs less than the real thing) and one of Tinny's M2 stoves. So, I don't feel like the stoves are too hot for the can. As well, I have always placed them over the fire with water in them, so it is not because I am boiling them dry.
I would also like to add that I have only used these beer can cook pots in the field about 3 times...all the rest of the times have been here at home. I tend to use them for morning coffee or evening tea. So, they are not going from extreme cold to hot, so it should not be from "shock" either.
So, between the bubbling liners in the cans, and the fact that they are so fragile, along with the growing weight of adding in my cup, lighter and spoon...not to mention a way for me to actually cook the food (meaning a cozy since I hate to cook in my cook pots...I hate clean-up). Well, I decided that maybe beer can cook pots are not for me.
So, I looked back at my 700 ml Ti cook pot...and decided to make the kit that would work for me...here is a video and write up I did on my new kit on my blog:
But, since then I have even made some changes to it, so here are the items:
Backcountry.com 700 ml Ti Pot w/ DIY Lid: 2.7 oz
DIY Cozy: 0.7 oz
DIY Mini Atomic Knock Off Stove in Baggie: 0.4 oz
DIY 5x18 Wire Pot Stand: 0.4 oz
Windscreen w/ Paperclip & Heat Reflector/Priming Pan: 0.6
ZPacks Cuben Fiber Stuff Sack: 0.1 oz
Mini Bic Lighter: 0.4 oz
1/2 LightLoad Towel: 0.25 oz
REI Long Handle Ti-Ware Spoon: 0.5 oz
REI Campware Cup: 1.8 oz
So, before I even give a total weight, I am sure that many of you are saying that is definitely not "UL" and I agree, but it is still light, durable, includes all components of the "cook system" and most of all, works for me. Saying that there are still a few ways I could cut a little more weight, and I may eventually...I could cut a few tenths of an oz by going with one of Suluk 46 Ti windscreen, I could get a lighter spoon for sure and I could mod the drinking cup some. I figure I could cut another 0.5 - 0.6 oz by doing this...so I may get around to it one day...
But, for those of you that have not added up the weights, the total weight of the above listed items are 7.85 oz. And again, this is everything (except fuel), and more importantly, the Ti pot is a hundred times more durable than my beer can pot.
Anyway, sorry for the long post...just wanted to share...