We used the speaking tube to warn the cook that the soup was boiling over.

Place the sample in a boiling tube and heat it gently over the Bunsen burner.

The students carefully labeled the boiling tubes before beginning the heating experiment.

The cellar master used a thief tube to draw a clear sample from the oak cask for tasting.

After finishing the last sheet, he used the empty toilet tube as a makeshift seed starter for his garden.

The art teacher collected empty toilet tubes for the children's craft project.

Under the microscope, she carefully guided the fishing-tube toward the paramecium to isolate it.

I packed several fishing-tubes in my tackle box before heading to the lake.

Please label the microfuge tube before placing it in the centrifuge to avoid mix-ups.

Before the experiment, she labeled the microfuge tubes and organized them by sample ID.