Patent ID: 8881927

Claim:
A closure system comprising: a container having a ridge, a land, and a groove disposed between the ridge and the land, wherein the ridge and land at least partially define upper and lower portions of the groove, respectively; a resealable plug having a first member comprising a protrusion portion that extends perpendicularly from a disk portion wherein the disk portion is sized and dimensioned to rest within the groove, and a pinchable second member coupled to the first member, such that the second member overlies the protrusion portion, wherein the second member comprises a catch that is extendable into, and retractable from, the groove at an angle with respect to the disk portion; wherein the resealable plug is configured to removably engage the container, such that (i) the catch bypasses the ridge when the second member is pinched, and (ii) the catch, after bypassing the ridge, extends into the groove when the second member is released; and wherein each of the container and the resealable plug comprises at least 90 wt % biodegradable materials.