As matt C says, the MSR pot lifter is much lighter than the heavy Trangia one, as well as being much smaller (plus it has plastic coated handles which are nice for very cold weather).
I do not go along with using foil for a lid, as I feel this is just too limiting in use (no good for draining pasta etc, or can blow away). What I have done often is to make a lid from coke/pepsi cans, as these are much stronger, and keep there shape well.
If your pot is not too big a drink can lid can weigh as little as 6g, which is pretty good.
I would simply cut a circle of metal (up to you whether you opt for steel or aluminium) roughly 14-16mm larger than the pot (7-8mm each side), and then place the pot in the centre of it. Draw a line around the diameter of the pot onto the new lid, and then using the pot itself (or even a small piece of wood) bend up the edge of the new lid to a right angle. The new lip on this lid will just fold into itself, just like the foil on take away trays, and needs no trimming or extra cutting.
I sometimes use a hole punch (before folding) to make one hole on one side of the lid, and three on the other, to allow steam to escape (so the lid does not 'lift off', and so it can be used for draining pasta etc.
A small strip of extra metal can be glued to the top centre of the lid with JB Weld, so that a ring/grip tie or string handle can be fitted.
I don't have a pic to hand, but if A small key ring type ring is threaded through the metal strip, it will be able to 'stand up' on the pot to make the lid easier to lift (similar to many commercial pots).
The advantages of drinks can lids, are that they can be 90% lighter than the original lid, plus keep their shape so that it is easier to store cooking gear in the pot without losing it.
Finally, some folks keep a retaining strap around their pots/lids, and a very light alternative to webbing are very thin grip ties. Join two or three together, and adjust them to be the exact size of the pot/lid, and you may find that they weight 50-80% lighter than webbing, as well as being very strong and much quicker to fit around the pot.
Just some ideas for you.
I'm sure some of you are not at all surprised I have suggested drinks cans for making things

Don't worry, I won't be suggesting using coke can stoves here........Even if they do only weigh 10 grammes (or 6 grammes for a red bull stove)
Edited: 29/04/2010 at 22:23