Materials: An energy drink can or beer can.
Tools required: small blade or scissors. Thumb tack or small nail.
Time required: 10 mins.
Method: Use the thumb tack to pierce a row of 30 or so jet holes round the can 1 1/4" up from the base. Cut the can off 2 3/4" high. Use your thumb nail on the inside to create a fold line 1 1/2" up from the base. (careful you don't cut yourself!). Fold can in on itself (this bit of origami takes a bit of practice).
Using my 1.3l evernew Ti pot directly on top, this 5g stove primes in around 10 secs and boils two cups from 46f - 8C in around 10 mins with half an oz of fuel.
-Tallbloke- Got simplicity?- Yes! ;-)
Edited to add disclaimer:
I came up with this idea this afternoon. It may well have been done already by someone else, though I haven't come across the idea anywhere else. Fooling around with alcohol stoves is fun, but as these instructions are provided free, I will accept no responsibility if you sever your thumb, burn down your shed, ignite your neighbour's dog etc etc. ;-)