Which preposition to use with glas

of Occurrences 1%

[* Ingate, entrance, beginning.] "Why then dooth flesh, a bubble-glas of breath, 50 Hunt after honour and advauncement vaine, And reare a trophee for devouring death With so great labour and long-lasting paine, As if his daies for ever should remaine?

Which preposition to use with  glas