The Coleman unit was new and comes with colored but still transparent cylinders. Older units like the JE Dams had clear cylinders which I lightly painted. The unit pictured had orgl cylinders that leaked long ago and I found some Jalepenos or somthing in glass jar that were jsut about an exact fit and used those back when I still had bubblers and oil.
Painted some older Colean clear cylinders as well.