A pair of small stainless steel bowls.
This is because someone, who may have been me, saw fit to consume a large mug of red wine on an empty stomach before removing the potatoes from the campfire, and placing them immediately into our (plastic) bowls, which now appear to have fused forever with the foil that was covering the potatoes, as well as having slightly deformed and holey bottoms. Ahem. I probably shouldn’t be trusted with FIRE at all but at least metal will stand up slightly better to such stupidity….
(NB: those Lifeventure windproof matches are awesomely good).