Campingaz Twister & Case 270PZ

While it's similar to the Rambler, you can see why the 270PZ costs more. Build quality is excellent and, when the three support arms are folded, and protected by a strong plastic case, the whole thing fits in the hand. As it has Piezo ignition, no matches are required, and the fierce flame boiled water in less than two minutes. But it's pretty basic.