>>306481aluminum can be beaten back into shape if abused, whereas plastic will just break.
both are less than excellent health-wise, so it's a bit of a wash.
i usually boil water in a steel canteen and add it to whatever i'm rehydrating if im going light-n-fast.
slower trips (like if i've already had to bring a bear keg) i'll bring the aluminum set n maybe make a stew or something with found edibles (seaweed, mussels, juniper berries, bayleaves, whatever) and some basic packed food (ramen, beef jerky, buillon cubes)
>tldr: it really sucks when your cookset breaks and you're down to gnawing on cold/dehydrated rations- choose something fixable/durable (not usually plastic) 