| 主权项 |
1. A package comprising:
a. a front member, the front member comprising a first surface and an opposing second surface, and a front sealing surface surrounding the second surface; b. a back member, the back member comprising a first surface and an opposing second surface, a back sealing surface surrounding the second surface and a back flange extending from the back sealing surface, the back flange comprising an inward facing surface and an outward facing surface, c. a joint securing the front sealing surface to the back sealing surface; d. a cavity between the second surface of the front member and the second surface of the back member; and e. a ring member positioned adjacent the outward facing surface of the back flange surrounding the back member. |
