Share 'how to make a "mirror"'

The 1st issue of my new zine project revolves mostly on identity, so i'd like either the cover or a page of the zine to be a "mirror" but then again a real mirror would weigh too much (ergo high shipping cost). Any ideas onw hat material would show reflection?   at first i was thinking of just using foil... but 1) i havent thought of how to stick it on the page and 2)it may also tear too easily a…