hi! there's room for more input, but do check out these previous threads on popcorn

• How did popcorn become the staple food of the cinemas (and eventually an accompaniment to the home cinematic experience)? - featuring /u/texpeare

• When and why did popcorn become a popular and common movie snack? - /u/tunaman808

• When did the eating in cinema appeared? Was popcorn created for this purpoise? Was there anything similar before in theaters? - /u/Gadarn

ed: a word