Transfer lid

1. A transfer lid for use with a fluid container, the transfer lid comprising:

a top panel having a fluid transfer port for transferring fluid through the transfer lid to and from the fluid container;

an attachment collar extending downward from the top panel and configured for removably attaching the transfer lid to the fluid 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 having an inner surface, an outer surface, and a free lower end opposite from the top panel, the free lower end having a radiused profile extending from the inner surface to the outer surface that includes a bulb extending laterally outward from the free lower end to sealingly contact an inner surface of the fluid container and the free lower end being radiused or tapered to provide a smooth interface as the inner collar slides onto the fluid container, wherein the inner collar further includes a vent opening extending therethrough, wherein in use with the transfer lid attached to the fluid container, air can pass into and out of the fluid container by passing through the vent opening, but not past the sealingly contacting bulbous free lower end, of the inner collar.

2. The transfer lid of claim 1 , wherein the vent opening comprises a vent slot.

3. The transfer lid of claim 1 , wherein the vent opening extends generally radially through the inner collar.

4. The transfer lid of claim 1 , wherein the vent opening extends non-radially through the inner collar.

5. The transfer lid of claim 4 , wherein the non-radial vent opening comprises an active vent allowing a user to selectively open and close the vent opening.

6. The transfer lid of claim 1 , wherein the inner collar comprises a tapered contact face for engagement with the fluid container.

7. The transfer lid of claim 1 , wherein the fluid container comprises a breast milk pump collection container having an externally threaded rim, and wherein the attachment collar of the transfer lid comprises internal threads compatible with the externally threaded rim of the breast milk pump collection container.

8. The transfer lid of claim 1 , wherein the fluid transfer port comprises an enteral-only coupling.

9. The transfer lid of claim 1 , further comprising a port closure cap for closure of the fluid transfer port.

10. The transfer lid of claim 9 , wherein the port closure cap is attached to the transfer lid by a tether.

11. The transfer lid of claim 1 , wherein the vent opening includes a vent slot extending through the inner collar and extending radially along the inner surface of the top panel from an inner surface of the inner collar to an outer surface of the inner collar.

12. 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.

13. The fluid containment and transfer system of claim 12 , wherein the containmentshell comprises a breast milk pump collection container having an externally threaded rim, and wherein the attachment collar of the transfer lid comprises internal threads compatible with the externally threaded rim of the breast milk pump collection container.

14. The fluid containment and transfer system of claim 12 , wherein the vent slot extends generally radially through the inner collar.

15. The fluid containment and transfer system of claim 12 , wherein the vent slot extends non-radially through the inner collar.

16. The fluid containment and transfer system of claim 12 , wherein the fluid transfer port comprises an enteral-only coupling.

17. The fluid containment and transfer system of claim 12 , wherein the transfer lid further comprises a port closure cap for closure of the fluid transfer port.

18. The fluid containment and transfer system of claim 17 , wherein the port closure cap is attached to the transfer lid by a tether.

19. 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.