Antique quack medicine bottle that's blown in mold, dates to about 1880-1900:
DAVIS / VEGETABLE / PAINKILLER
Measures 4-1/2" x 1-1/2", with a hand tooled, collared lip, nice stretch in the neck, some tiny, entrapped air bubbles, and a smooth base.
In excellent condition without any chips or cracks, just a little inside haze.