GSI 1 Cup Stainless Mini Expresso

Easy as pie! (And, like pie, it will take longer than 90s.)
First off, this is tiny. The base's diameter will fit in a cupped palm and the height of the whole thing (put together) is ~6"/15.24cm. To fully disclose, I've been using this at home on a gas stove, but I doubt a difference in use on any gas camping stove. I'll paraphrase the hints I found in a MEC review: fill water to just above the pressure valve, put finely ground coffee in the provided metal filter and level off (don't pack down-I burned a batch the latter way), and cook over the lowest flame. It usually takes mine a couple of minutes. You'll need a small cup to catch the espresso (the clearance is 2 3/8"/6.03cm). And, in another steal from MEC, the 1-shot weight is 7.69oz/218g.

Easy as pie! (And, like pie, it will take longer than 90s.)
First off, this is tiny. The base's diameter will fit in a cupped palm and the height of the whole thing (put together) is ~6"/15.24cm. To fully disclose, I've been using this at home on a gas stove, but I doubt a difference in use on any gas camping stove. I'll paraphrase the hints I found in a MEC review: fill water to just above the pressure valve, put finely ground coffee in the provided metal filter and level off (don't pack down-I burned a batch the latter way), and cook over the lowest flame. It usually takes mine a couple of minutes. You'll need a small cup to catch the espresso (the clearance is 2 3/8"/6.03cm). And, in another steal from MEC, the 1-shot weight is 7.69oz/218g.