Brush holder

A jar to store the brush in. Works for 18mm, 25mm and 32mm brush (not 13mm).
Either you pour raw linseed oil into it, and hang the brush with the brush down into the oil, but not so that the top touches the bottom. Which the holder is adapted for.
Or you use it when you go out to a customer and work. drain the oil from the brush at home, hang the brush in the jar during transport.

It is not intended that the oil should exceed the bottom pop rivet in the can, then there is a risk of oil leaking.