Vintage make-up 1936 Lydia O'Leary's Covermark SPOT-STICK.
Portable, lipstick form, pimple and minor blemish cover-up, developed by Lydia O'Leary.
Came in 3 shades, light, medium, and dark. This has a "D" on bottom, which I believe indicates dark.
Measures about 2" long.
Please see photos.