Collocations for flask - noun

Thermos(R), vacuum | hip | metal, silver | conical, culture, round bottom
(all science)

fill | carry
When he climbed in the snow he always carried a silver flask of brandy for emergencies.

pull out
She pulled out her flask and drank from it.

uncork, unscrew | drink (sth) from, take a swallow from, take a swig from

contain sth
a culture flask containing 4ml of the medium

~ of
We took a flask of tea with us.