I used to travel with a Trangia or gas stoves, but for my recent trips I invested in a Pocket Stove (the Ti version weighs nothing), a MyTi 600ml mug from Alpkit and an Alpkit wind shield. The pocket stove will run on Hex blocks, Meths burner or twigs. Hex blocks are cheap, light, and faff-free (though yo get a bit of soot). The combo boils water well for tea/soup, but also holds a std 400ml can of soup, beans, rice bud etc. as a baine-marie and works really well. The whole rig is small and light enough to carry in a small bag when out for an afternoon stroll. It all depends how gourmet or how quick you want to be!