Check this out:
Good oil in a little bottle. The bottle is small enough to be stored in any little nook or cranny of your AR, so there’s no excuse to not have lubricant handy, and thus no excuse for your AR to not be adequately lubricated.
Neat concept!
Disclosure: I have no personal vested interest in this product or endeavor, but I’m acquainted with the guy behind the venture. It was a cool bit of inspiration he had (necessity being the mother of invention), and I’m happy to help and support him in this.