Containment cylinder
A containment cylinder was a type of cylindrical-shaped container used for collecting or holding samples. 

Oxygen aboard 22nd century s was kept in O2 cylinders. ()

In 2369, Lursa and B'Etor traded a cylinder of bilitrium in exchange for thirteen kilograms of latinum. ()

The Harvesters were stored in cylinders. () 

In 2371, a biopolymer sample was contained in a cylinder aboard Voyager. () 

Neelix owned a containment cylinder, which he called a little wonder. He once almost lost it to the Kazon. In 2374, it was stored in a Voyager cargo bay, where he retrieved it planning to contain a small amount of protomatter in it. ()
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