The invention relates to a vial for packaging a liquid to be dispensed as a drip including a vessel having a deforming wall that can be elastically reversed by means of intake of air into the vessel with a liquid dispensing head mounted thereon comprising a dropper tip projecting from the vial and an anti bacterial filtering membrane made to be partially hydrophilic and partially hydrophobic which is placed across the flow of liquid and air at the base of said dropper tip. The dispensing head comprises a hollow body insert containing a porous pad regulating the liquid flow placed downstream from the vessel and upstream from a chamber defined downstream by said membrane. At the base of said insert on the inside of the vial longitudinal arches supporting a central pad arrange a star formation of passages radially guiding the air that enters the vial after having passed through the porous pad.
