Late on this thread. Often I make a very small fire indeed when on the move and I just want a quick brew or light snack refresher before pushing on. Usually I don't carry anything special for supporting pot and place direct on fire using a couple of thicker sticks to put pot on (to avoid excess smoke I try to pick dry as possible twigs in hedgerows not damp ones off the floor, hawthorn often has dead twigs in the hedgerows I've found, but thicker sticks for pot support found lying on the floor are often damp so cause excess smoke not always desirable depending on location), however of late I have been playing around with a little d.i.y. pot support I have made, with this I only need to use a very small amount of thin twigs to make a quick brew, I have found I need less twigs with this than when sticking pot direct on fire. I travel lightweight and don't like carrying anything for supporting a pot on a fire (those trivets are heavy and very expensive) but this little one I have made, though suitable for small light pots only, weighs hardly anything so I've been trying it out. it's handy when walking in places where you have to use a normal meths/esbit/gas stove but can occasionally make a little fire for a change and you don't want to carry excess items (I have in the past occasionally used three tent pegs shoved in the ground but this seems a little more stable).
d.i.y. folding pot support made from that single strand fencing wire, comprising of three bent legs each with an eye on one end, nut and bolt through the eyes to hold the three legs together, will support small pots the typical backpacker carries but not heavy pots (which most backpackers don't carry anyway). each leg is 14cm height x 10cm wide (though it could be made smaller), weight about 30-40 grams. Pics below taken for demonstration only in my own garden, apologies for their poor quality.
shown here folded away, I stick a bit of silicone tube on ends when it's in backpack so the ends don't poke holes in backpack.
shown here in use with an msr titanium pot.
shown here with stand only and no pot.
There you go, ATB.