Sandsnakes I know the idea of a screw cap sounds ideal but trust me on this, folks forget, and that makes it a bomb. It's bad enough when the cork is blown out........and I've seen that happen three times over the years
I didn't believe anyone could be so daft (ahem ! absentminded) but even experienced folks do it. Fair enough on a water bottle though.
The Swiss volcano kettle is a favourite bit of my kit
I've got two. It's small, incredibly light and very useable. Packs easily in a rucksac too. It's *supposed* to run on stuff like greenheat gel but I just use it with whatever I get hold of............half a newspaper boils enough water for a Ti mug of coffee, but twigs work very very well and feathersticks are excellent.
cheers,
Toddy