Maybe, on a related note:
One of my littler hobbies is to pick up lost one-way butane lighters on the road (lest they get run over and be destroyed), clean them and fix the mechanism with spare parts from their late peers, and then every now and again, hand out a small bundle of ‘lightly pre-useds’ to people who actually might need them.
(I don’t smoke, so use lighter only sparingly for other things)
I appreciate those butane throw-aways from an engineering standpoint. I think the evolution here is pretty much done because the desired task can hardly be achieved in a more cost efficient way than with these. They are also really quite hardy (as long as not dropped in the middle of a road) and easy to repair.
