The pots are about the same as aluminum in weight. Likely they are stronger, though. One of the problems with making thinwalled ti is it's tendancy to tear when pressing it. I would guess that these are heated much hotter to acheive this. So, the price to manufacture them is the same, maybe slightly more.
I really like the idea of getting down to the same weights as aluminum, though. Few, if any, ti pots can match the aluminum for weight per volume. For example, the 1.7L aluminum pot I use weighs about 5.75 ounces(top and bail included.) This gives a ratio of about 3.38oz/L. (I know mixing Metric and English, again.) The .9L grease pot is about 3.25oz including top or a ratio of 3.58oz/L. Even though they are thin walled, the TOAK products do not quite achieve this at 7.4oz/1.6L, or 4.63oz/L and the 1.3L pot, at 5.0oz, works out to 3.85oz/L.
The bowels are really small for boiling water at 2"/1-7/8" height and the small volume precludes cooking. But these are lighter when you consider it would take about 2.35 of them to make up a liter, or a ratio of about 3.19oz/L. Of course, you still need a top and a bail handle to handle them, but as the OP suggested, a bail handle could be added for a 12oz capacity. And aluminum foil could be used as a top. But, this increases the weight per liter ratio to about 4.02oz/L (assuming a total of 5gm added.)
Scorching is a problem with hot spots developing easily if you do any cooking as was mentioned. If all you do is drink one cup of coffee in the morning and only do boil'n'dump meals, you could probably get away with it. The wider bottom likely eans a little higher efficiency compared with a beer can pot.
