Flask adjectives are listed in this post. Each word below can often be found in front of the noun flask in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing FLASK.
bottom, bottomed, closed, conical
crystal, distilling, dry, empty
erlenmeyer, first, full, graduated
large, little, metal, necked
own, same, sealed, second
small, stoppered, volumetric
Hope this word list had the adjective used with flask you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.