Field & Range Needle Oiler

This oil was recommended to me. Tests show that it provides excellent rust prevention. The needle oiler is a handy size (1 ounce). The needle is long enough with a barrel that is wide enough to allow oil to pass through at a proper rate for the thin viscosity. The needle is fitted into a plastic plug that fits snugly in the neck of the bottle. It looks like it could be removed for refilling. It arrived with a child-resistant "slip cap" as is found on most medicine bottles. So I removed the slip cap with very small "nippers". Now, the inner cap is much easier to remove. Overall, this seems to be the way to go.