This winter gas concept looks very questionable to me. Surely the presence of a bit of paper won't increase the propensity of propane, butane or isobutane to evaporate at low temperatures, or increase the pressure inside the canister. What's it supposed to do? "Increase the surface for the evaporation process." Sorry, that makes no sense to me. Increasing the proportion of propane would work, but I believe manufacturers can't do that because of safety regulations.
As for the summer cartridges, it sounds as if they've reduced the amount of propane. That's brilliant â€” nobody ever thought of just turning their stove down.
Yes had that with the pocket rocket but why did it work with the Coleman partially full then just stop working.But still works with a full Coleman.Seems to be that works with full cylinders but when they are part used at some point then stops working.Pressure problem?
Perhaps the valve allowing the gas to get through is only partly engaged with the Coleman cylinder, so works at high pressure. Seems like a pretty major fault with a stove given that Coleman cylinders are all you can buy in some places.
Some MSR gas stoves won't work with cylinders from other manufacturers unless you screw them on very tight indeed. Something to do with the MSR stoves and cylinders being made to very fine tolerances, apparently. Perhaps the same could apply with the Alpkit stove?
If you do get a new flask, I would echo the advice offered above and get one of the Thermos Ultimate models. Even the smallest one — about 03l, I think — keeps liquid hot through a long day on the fells.
Having said that, most of the flasks I've had over the years have worked reasonably well, until I lost them or their stoppers. Only one stopped working, and that had suffered a 150ft fall on Pillar Rock.
Berghaus are particularly bad when it comes to dropping one product only to introduce another with seemingly near identical specs but a completely different name. Also, they never seem to give a product any time to "bed in". If it doesn't sell in the first season, they drop it.