snowpeak, ti, narrow style, something like 900 ml, lid 0.69 oz. Durability? Lasts forever. Shape? Good, water goes back in pot during boiling, holds steam in nicely during cozy cooking, and keeps the food smell from the cozy a bit too. Sharp edges? None. Has a little handle, easy to pick up. I like how titanium holds no heat, it's actually my favorite feature of it. Lid also works well to keep windscreen in place, it's a bit taller than pot, so the lid covers it all when it's packed up. Easy to wash, easy to prop up and dry. I guess aluminum would save a few grams, give or take, but not worth thinking about, plus I'll never find a lid that has the same fit anyway. Function trumps here. I actually tried making one out of flashing but decided it was really a waste of time.
Better places to dump weight, most of my ounces are trimmed now, only thing left is the tent. Saving a few 1/2 ounces here and there just ends up saving an ounce or two at a certain point, not pounds, and that's just not actual weight that will change anything in any trip I ever take. More about clothing brought, how much, etc, rain gear, and that stuff.
Even tried the victorinox classic to see where else I can trim some weight, just to see how that is, on a recent trip, fine as a toy, but it's not a knife, conclusion? If I want a knife, will need to carry a knife, though the classic has decent small working scissors, but the rest of it is largely useless except as a short cutting edge like a razor blade would have. Though I do now see why some people suggest razor blades vs that little thing, there isn't as much difference as I thought.
I think diminishing returns is the operative phrase. Food is the real place I can get the weight per day most optimized (plus of course body weight). Pemmican rocks, fats rock, 2 oz of olive oil per day saves you more weight in calories than almost any small mods you do to other kit, along with a few big ones.
With my base weight now, I walked down a mountain in roughly the same time it took me to walk up it, much to my surprise, I'd allocated the 30 minutes per 500 feet ascent, and it just didn't happen, and that's all I need to see, that's good enough. Knees are not complaining either.
So what does a lid do? It holds in a bit of pressure, and makes stuff boil faster. So my guess is, a standard, well fitted lid, saves you far more in fuel weight than a light lid saves or foil does. Diminishing returns again. Plus solid lids rattle nicely right when it starts to boil.