Erlenmeyer flask with two side tubes designed for vacuum filtration. The inscription reads "Pilling-Phila / Pyrex ... CH.316056.092 catalog number 316056.092 accession number 217523 Object Name ...

In many labs, you will see Erlenmeyer flasks used for shake cultures filled to 50% of the nominal volume, which is not a good idea, considering that most cultures are supposed to be aerobic ones.