Quote:
cut a window in the beer can then cut a plastic piece from a pop bottle
to cover the window. the round shape of the pop bottle will hold it in place.


I had thought of something similar. You could use silicon adhesive to affix the clear plastic. It would also give the can more strength where you cut the openings.
You can also add a top with some flashing and use a guitar string for the bail type handle. But then there's small candle lanterns made commercially that fold up and are not too expensive. I am still concerned with weight and am considering a tea lite type lantern.
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Enjoy your next trip...