Hmm.. is that a legitimate word: cenosillicaphobia? I wondered, as I looked at the letter board sign behind the bar counter in the Elysian Capitol Hill Brewery tonight.
Well, kind of. It looks like it was invented some 10 years ago. It is listed by Urban Dictionary, but not by Merriam-Webster (the gold standard for online dictionaries).
Ceno means empty, such as in cenotaph (a tomb or a monument erected in honor of a person, or group of persons, whose remains are elsewhere), sillica would be the glass and phobia (of course), the irrational fear.
No reason to suffer from cenosillicaphobia when the bartender is right there, though – unless you have had several too many, already.