Aluminum was found, but after repeated experiments, they examined the original experimenters methodes and determined that it was contamination. Once this was removed, all data results were pretty clean.
K-Mart sells a .8L pot as a grease pot for about $5. This is perhaps the best solo pot available, since it is rather wider than most camping pots giving it good surface area for heat transfers. It is lighter than Ti by enough to make it worth carrying. A typical grease pot weighs ~3.625oz and contains about 1L of water, but I consider this a bit overfull, around .8 is usefull, though. It makes the best solo pot in this size range.
Generally, the top is flipped over, the "flange" is cut off and the pot top is replaced with a small, aluminum screw and wood. Steel wool or sand paper cleans the rough edges. This will leave a gentle, dished top that will not drip all over the stove, et al, in use. A bandana, or, gloves are needed as a pot lifter, unless you make a bail handle out of 12ga aluminum wire (scraps from a main house feed line.)Trail Designs makes a Caldera Cone for them, one of the origonals, but they will work on any stove with a pot stand.
No reason to worry about aluminum, since it is the most common metal found through out the world. Despite repeated and expanded studies, no toxic effects were noted for normal doses. Acidic foods can pit and corrode aluminum, though. It is doubtfull that most campers will cook tomotaoes, sauces, et al, for long periods of time, though. Boiling water is not a problem, since it forms oxides almost immediately when exposed to air. Oxides are not considered water soluable, rather like the coated pans you pay for.
Here is the link from Wikopedia.
The last paragraph says it best:
"According to the Alzheimer's Society, the medical and scientific opinion is that studies have not convincingly demonstrated a causal relationship between aluminium and Alzheimer's disease. Nevertheless, some studies, such as those on the PAQUID cohort, cite aluminium exposure as a risk factor for Alzheimer's disease. Some brain plaques have been found to contain increased levels of the metal. Research in this area has been inconclusive; aluminium accumulation may be a consequence of the disease rather than a causal agent. In any event, if there is any toxicity of aluminium, it must be via a very specific mechanism, since total human exposure to the element in the form of naturally occurring clay in soil and dust is enormously large over a lifetime. Scientific consensus does not yet exist about whether aluminium exposure could directly increase the risk of Alzheimer's disease."