Question Anyone recognizing this Tube?

This one ik have already for a while without knowing what it is.

Its a Tube, with at one side thread for screwing on a cap.
Messurements are 33cm length by 4cm width, with some armygreen still on it. The material is to be called not robust.
There are no markings or writings to find on it. It does though looks like it had an etiquet on it.

Please your reactions.

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