Dispensing system for dispensing content between the inside of a container and the outside of a container by means of a needle, said system comprising a port and a container, the port being suitable for attachment to a container and suitable for being traversed by a needle used for the transfer of content between the inside of the container and the outside of the container, said port comprising: - a rigid ring-shaped body extending in a direction, said body comprising a side wall surrounding a channel extending between an inner end and an outer end, said inner and outer ends (101, 102) being at opposite ends along the direction, said body being open at said inner and outer ends (101, 102), - an overmolding member made of thermoplastic elastomer, the overmolding member comprising a ring-shaped body extending along the direction, said ring-shaped body comprising an inner surface and an outer surface, the overmolding member further comprising a sealing portion integrally formed with the overmolding member, suitable for being traversed by the needle in a direction close to the direction, the needle passing through the inner and outer ends (101, 102) in order to transfer content between the inside and the outside by means of the needle, the overmolding member sealing the inner end of the channel in a fluidtight manner in the absence of a needle after withdrawal of the needle, characterized in that the inner surface of the overmolding member is in contact with the side wall of the rigid body on an outer portion of said rigid body extending continuously beyond the inner end of the rigid body, the ring-shaped body of the overmolding member extending continuously beyond the inner end of the rigid body and being closed by the sealing portion such that the sealing portion is facing the inner end, a space being free between the sealing portion of the overmolding element and the inner end of the rigid body, in that the overmolding member further comprises an adhesion portion suitable for direct attachment of the port to the container, the adhesion portion being at the level of the outer surface of the overmolding member, said container comprising a wall with an opening in its wall, the overmolding member being partially inserted into the container through the opening, the wall of the container at its opening being able to be welded to the adhesion portion of the overmolding member. the port being suitable for attachment to a container and suitable for being traversed by a needle used for the transfer of content between the inside of the container and the outside of the container, said port comprising: - a rigid ring-shaped body extending in a direction, said body comprising a side wall surrounding a channel extending between an inner end and an outer end, said inner and outer ends (101, 102) being at opposite ends along the direction, said body being open at said inner and outer ends (101, 102), - an overmolding member made of thermoplastic elastomer, the overmolding member comprising a ring-shaped body extending along the direction, said ring-shaped body comprising an inner surface and an outer surface, the overmolding member further comprising a sealing portion integrally formed with the overmolding member, suitable for being traversed by the needle in a direction close to the direction, the needle passing through the inner and outer ends (101, 102) in order to transfer content between the inside and the outside by means of the needle, the overmolding member sealing the inner end of the channel in a fluidtight manner in the absence of a needle after withdrawal of the needle, - a rigid ring-shaped body extending in a direction, said body comprising a side wall surrounding a channel extending between an inner end and an outer end, said inner and outer ends (101, 102) being at opposite ends along the direction, said body being open at said inner and outer ends (101, 102), - an overmolding member made of thermoplastic elastomer, the overmolding member comprising a ring-shaped body extending along the direction, said ring-shaped body comprising an inner surface and an outer surface, the overmolding member further comprising a sealing portion integrally formed with the overmolding member, suitable for being traversed by the needle in a direction close to the direction, the needle passing through the inner and outer ends (101, 102) in order to transfer content between the inside and the outside by means of the needle, the overmolding member sealing the inner end of the channel in a fluidtight manner in the absence of a needle after withdrawal of the needle, characterized in that the inner surface of the overmolding member is in contact with the side wall of the rigid body on an outer portion of said rigid body extending continuously beyond the inner end of the rigid body, the ring-shaped body of the overmolding member extending continuously beyond the inner end of the rigid body and being closed by the sealing portion such that the sealing portion is facing the inner end, a space being free between the sealing portion of the overmolding element and the inner end of the rigid body, in that the overmolding member further comprises an adhesion portion suitable for direct attachment of the port to the container, the adhesion portion being at the level of the outer surface of the overmolding member, said container comprising a wall with an opening in its wall, the overmolding member being partially inserted into the container through the opening, the wall of the container at its opening being able to be welded to the adhesion portion of the overmolding member.