have no idea way some buddy will need one of these, but still a fun project.
you basically take apart the upper part of the lighter and stick it into a plastik bottle cap. it actually not that simple, but i am sure you can figure it out.
notice that you will also need to re-glue that bottom part of the lighter so you will be able to fill the container with new gas.
a nice way to impress your friends and colleges. remains me a bit of a cheep improvised memorial instrument.