Right now Lee Valley has their Precision Pen Oiler pen on clearance for $5.00.
From the photos, it appears to be the Empire 2776 Precision Oiler that was covered before at a price of $8.00. It’s of much better construction that the usual plastic tube pin oilers and looks like a useful item for tiny oiling jobs. Push-button action disposes a “drop” at a time (no mention of volume per drop). And it has a sealed cap so you can carry it in your pocket without worrying about spills.
Lee Valley Precision Oiler Pen [leevalley.com]