Abstract: The application is directed to a leak-resistant closure for a plastic container having a generally planar central portion a peripheral portion, and a spring structure. The peripheral portion defines an annular recess with an inner wall having a secondary sealing formation for engaging a free edge of a container The outer wall of the peripheral portion has a primary sealing formation on an inner surface thereof and faces the annular recess, thereby defining the primary sealing formation. The spring structure biases the peripheral portion radially outward from the central portion, and the spring structure is positioned between the central portion and the peripheral portion.

Abstract: The application is directed to a leak-resistant closure for a plastic container having a generally planar central portion a peripheral portion, and a spring structure. The peripheral portion defines an annular recess with an inner wall having a secondary sealing formation for engaging a free edge of a container The outer wall of the peripheral portion has a primary sealing formation on an inner surface thereof and faces the annular recess, thereby defining the primary sealing formation. The spring structure biases the peripheral portion radially outward from the central portion, and the spring structure is positioned between the central portion and the peripheral portion.

Abstract: A leak-resistant plastic container and closure are disclosed, where the container has an open end, an inner periphery, an outer periphery, and a container flange extending around the inner periphery at the open end. The closure has a generally planar and circular inner lid, a spring extending around an outer circumference of the inner lid, an arcuate flange receptacle extending around an outer circumference of the closure at a circumference outside the spring, where the flange receptacle has an inner surface and an outer surface, a secondary sealing bead, positioned on the inner surface of the flange receptacle, and a primary sealing bead, positioned on an outer surface of the flange receptacle and opposite the secondary sealing bead, where the spring exerts a sealing pressure against the container flange when the closure is placed on the open end of the container.

Abstract: A leak-resistant plastic container and closure are disclosed, where the container has an open end, an inner periphery, an outer periphery, and a container flange extending around the inner periphery at the open end. The closure has a generally planar and circular inner lid, a spring extending around an outer circumference of the inner lid, an arcuate flange receptacle extending around an outer circumference of the closure at a circumference outside the spring, where the flange receptacle has an inner surface and an outer surface, a secondary sealing bead, positioned on the inner surface of the flange receptacle, and a primary sealing bead, positioned on an outer surface of the flange receptacle and opposite the secondary sealing bead, where the spring exerts a sealing pressure against the container flange when the closure is placed on the open end of the container.