"narrow-necked hollow vessel for holding and carrying liquids," mid-14c., originally of leather, from Old French boteille (12c., Modern French bouteille), from Vulgar Latin *butticula (source also of Spanish botella, Italian bottiglia), diminutive of Late Latin buttis "a cask," which is perhaps from Greek.
In reference to a baby's feeding bottle by 1848 (sucking-bottle is attested from 1844). The bottle, figurative for "liquor," is from 17c. Bottle-washer is from 1837; bottle-shop is from 1929; bottle-opener as a mechanical device is from 1875. Bottle-arsed was old printers' slang for type wider at one end than the other.
"large bottle for wine or liquor," mid-15c., from Old French flacon, flascon "small bottle, flask" (14c.), from Late Latin flasconem (nominative flasco) "bottle" (see flask).
Another theory traces the Late Latin word to a metathesis of Latin vasculum. "The assumption that the word is of Teut[onic] origin is chronologically legitimate, and presents no difficulty exc[ept] the absence of any satisfactory etymology" [OED]. The similar words in Finnish and Slavic are held to be from Germanic.