A package, comprising: a first member having a front surface and a rear surface, the first member being substantially planar; and a second member having an inner surface and an outer surface, the inner surface and the rear surface of the first member defining a first cavity, a periphery of the inner surface of the second member being joined to a periphery of the rear surface of the first member to define a sealed portion, and respective perimeters of the first member and the second member cooperating to define an outer edge of the sealed portion; wherein the second member comprises a ridge at least partially circumscribing the first cavity while remaining inward of the outer edge, the ridge comprising: an inner wall; an outer wall; and a rim connecting at least a portion of the inner wall and outer wall, both the inner wall and the outer wall extending rearward from and substantially perpendicularly relative to the first member, wherein at least a portion of the rim, over a length of the ridge, is substantially parallel to the first member, and wherein the rear surface of the first member and the inner surface of the second member further define a second cavity, and wherein the second cavity is at least partially circumscribed by the ridge, characterized in that at least a portion of the rim, over the length of the ridge, connects a rear portion of the outer wall to a front portion of the inner wall, such that at least a portion of the inner wall of the ridge defines at least a portion of the second cavity. a first member having a front surface and a rear surface, the first member being substantially planar; and a second member having an inner surface and an outer surface, the inner surface and the rear surface of the first member defining a first cavity, a periphery of the inner surface of the second member being joined to a periphery of the rear surface of the first member to define a sealed portion, and respective perimeters of the first member and the second member cooperating to define an outer edge of the sealed portion; wherein the second member comprises a ridge at least partially circumscribing the first cavity while remaining inward of the outer edge, the ridge comprising: an inner wall; an outer wall; and a rim connecting at least a portion of the inner wall and outer wall, both the inner wall and the outer wall extending rearward from and substantially perpendicularly relative to the first member, wherein at least a portion of the rim, over a length of the ridge, is substantially parallel to the first member, and wherein the rear surface of the first member and the inner surface of the second member further define a second cavity, and wherein the second cavity is at least partially circumscribed by the ridge, characterized in that at least a portion of the rim, over the length of the ridge, connects a rear portion of the outer wall to a front portion of the inner wall, such that at least a portion of the inner wall of the ridge defines at least a portion of the second cavity. an inner wall; an outer wall; and a rim connecting at least a portion of the inner wall and outer wall, both the inner wall and the outer wall extending rearward from and substantially perpendicularly relative to the first member, wherein at least a portion of the rim, over a length of the ridge, is substantially parallel to the first member, and wherein the rear surface of the first member and the inner surface of the second member further define a second cavity, and wherein the second cavity is at least partially circumscribed by the ridge, characterized in that at least a portion of the rim, over the length of the ridge, connects a rear portion of the outer wall to a front portion of the inner wall, such that at least a portion of the inner wall of the ridge defines at least a portion of the second cavity.