The hikers packed several vacuum flasks to keep their tea warm during the chilly morning trek.

The students carefully labeled the Erlenmeyer flasks before beginning the titration.

She carefully rinsed the conical flasks before beginning the titration.

The lab stocked several Florence flasks on the shelf, ready for the distillation.

Careful handling of Schlenk flasks is essential when performing air-sensitive syntheses.

Before the titration, she rinsed the Kjeldahl flask with distilled water to remove any contaminants.

The microbiologist held up the Kitazato flask to inspect the growth of the culture.

The microbiologist carefully sterilized the Kitasato flask before beginning the culture.

Before starting vacuum filtration, make sure the filter paper is properly seated in the Büchner funnel fitted to the Kitassato flask.

At the outdoor market, antique dealers displayed a row of snap flasks that clicked open when handled.