Transfer lid

A fluid containment and transfer system comprising:

• a containment shell defining a contained volume therein and having a rim defining an opening for accessing the contained volume and defining an angled inner circumferential contact face opposite an angled outer circumferential contact face, the containment shell comprising a threaded coupling on the outer circumferential contact face around the opening;
• and
• a transfer lid comprising a top panel, an attachment collar extending downward therefrom and configured with helical threads for releasable engagement with the threaded coupling of the outer circumferential contact face of the containment shell to allow attachment and removal of the transfer lid from the containment shell, an inner collar extending downward therefrom and arranged generally concentrically with and spaced inwardly from the attachment collar, a vent slot extending through at least a portion of the inner collar from an inner surface to a tapered contact face configured for engagement with the angled inner circumferential contact face of the containment shell rim, and a fluid transfer port through the top panel for transfer of fluid through the transfer lid into and out of the contained volume of the containment shell,
• wherein the inner collar is flexible, and the tapered contact face of the inner collar has a steeper taper angle than an angle of the angled inner circumferential contactface of the containment shell rim, such that partial closure of the transfer lid onto the containmentshell allows clearance for venting, and wherein furthertightening of the transfer lid onto the containment shell closes the vent slot to prevent venting.

A breast milk containment and transfer system comprising:

• a breast milk pump collection container having a rim with an angled inner circumferential contactface and threads along an outer circumferential contact face, the container defining a contained volume;
• and
• a transfer lid comprising a top panel, an attachment collar extending downward from the top panel and configured for releasable engagement with the rim threads of the breast milk pump collection container to allow attachment and removal of the transfer lid from the breast milk pump collection container, an inner collar extending downward from the top panel and arranged generally concentrically with and spaced inwardly from the attachment collar, the inner collar further comprising an inner surface, an outer surface, and a vent slot extending through at least a portion of the inner collar, and a fluid transfer port through the top panel for transfer of fluid through the transfer lid into and out of the contained volume of the breast milk pump collection container,
• wherein the inner collar has a radiused free lower end opposite from the top panel, the radiused free lower end extending from the inner surface to the outer surface of the inner collar and having a profile that includes a bulb extending laterally outward from of the free lower end to sealingly contact an inner surface of the container and that is radiused or tapered to provide a smooth interface as the inner collar slides onto the container, wherein in use with the transfer lid attached to the container, air can pass into and out of the container by passing through the vent slot, but not past the sealingly contacting bulbous free lower end, of the inner collar, and
• wherein the inner collar is flexible and includes a tapered contact face for engagementwith the angled inner circumferential contactface of the container rim, and the tapered contact face of the inner collar has a steeper inclination than the angled inner circumferential contactface of the container rim, such that selective control of the extent of closure of the attachment collar of the transfer lid with the threaded rim of the breast milk pump collection container is configured such that the extent of venting can be varied between a vented configuration and a non-vented configuration.