I always carry a hip-flask with me when I go camping.

I need to buy some Dewar flasks for the laboratory.

I have two vacuum flasks.

I need to order some Büchner flasks for the chemistry lab.

The laboratory was filled with Erlenmeyer flasks of various sizes.

I need to wash the conical flasks before using them.

I need to buy some Florence flasks for my chemistry experiment.

I need to buy some Schlenk flasks for my chemistry experiment.

I always carry two pocket-flasks with me when I go camping.

I always carry two pocket flasks with me when I go camping.