Constructino of a personal portable disposable combustion vaporizer
pulmonary medicine absorbtion apparatus via additive manufacturing

or, making a pipe out of celery

Whereas many field improvised pipes are made from subtractive technology
(think coring apples, puncturing bell peppers, etc.) it is possible to
assemble a decent ephemeral pipe from celery which takes the form of
longitudinally slided half tubes of sufficient length. By planing the
rounded edges of the half-tubes one can assure a sufficiently airtight
seal.

Just thought I'd put this out there..