15 that allows air to freely pass between the interior of the container 30 and the compliant seal 7 such free air flow is also enabled by the diameter of the lid hole 11 being larger than the diameter of the stem 5 the enlarged view of the cap 17 reveals splines 19 that run along its interior and create a compression fit between the cap 17 and the retainer member 12 the cap 17 features sloped sides 18 that facilitate installation on the retainer member 12 the height of the cap 17 is chosen to prevent its top surface 20 from contacting the bottom surface of the lid 8 and restricting air flow into and out of the vacuum container 30 fig3 shows the preferred embodiment of the invention wherein the check valve 2 is in the tilted position such a tilt is caused by applying a force on the right side of the check valve 2 as a result the left side of the o ring 22 is compressed more than it was when the assembly was in the neutral position with the check valve 2 pointing vertically concurrently the right side of the o ring 21 is decompressed but remains in contact with the check valve 2 on one side and the outside of the vacuum container 91 on the other side the decompressed segment of the o ring 21 allows air to reenter the container not shown through the interface between the outside of the vacuum container 91 and the decompressed segment of the o ring.