Patent ID: 7255244

Claim:
A device for sealing a substance in a container, said container having a base and a cylindrical wall extending upwardly from said base, said wall including an inner surface having an inner diameter, said device including: a circular disk, said disk having an inner surface and outer edge, the diameter of said outer edge being smaller than the diameter of said container wall inner surface; and a flexible seal perimeter, said seal perimeter having a side wall extending outwardly and upwardly from said disk outer edge, said side wall including at least three sections and an outer edge, at least one of said wall sections extending outwardly and angularly to said disk at a first angle and at least one of said wall sections extending angularly to said disk at a second angle, and a lip extending generally horizontally from said side wall outer edge, the diameter of said lip being greater than the diameter of said disk inner surface, wherein upon insertion of said device into said container, said side wall is caused to flex to allow for said larger lip diameter and said lip frictionally engages said inner surface of said container wall, whereby a sealed device and container wall interface is provided, said sealed interface being maintained during non-vertical and inverted orientations of said container.