The invention relates to a bottle for packaging liquid comprising a reservoir (2) on which is mounted a dispensing head (4) which comprises an axially movable portion (16) of a liquid‑withdrawing pump system and a dispensing tip (12) that moves as one with the mobile portion and via which the liquid is delivered. According to the invention, the bottle has a cap (6) formed from a sleeve (20) that covers said mobile portion for activating the pump and a removable part (22) for covering the bottle, said removable part being held on said sleeve by a retaining device (24) that can be severed when the bottle is used for the first time.