A resealable vacuum-tight closure mechanism comprises a first closure element that includes a first base and a second closure element that includes a second base. A first contact surface on a first interlocking profile depends from the first base and a second contact surface on a second interlocking profile depends from the second base. The first and second contact surfaces provide a maximum occlusion distance when the first and second interlocking profiles are in an occluded state. A first sealing member extends from the first base, has a first length, is spacedly disposed from the first interlocking profile, and has a first sealing surface disposed thereon. A second sealing member extends from the second base, has a second length, is spacedly disposed from the second interlocking profile, and has a second sealing surface disposed thereon that is complementary to the first sealing surface. A sealing reservoir protrusion is disposed between the first sealing member and the first interlocking profile and has a volume sufficient to form a first gastight seal in a first occluded space between the first and second closure elements and bounded by the first and second occluded sealing members and the first and second occluded interlocking profiles upon formation of an end-stomp at an end of the first and second closure elements. A sum of the first and second lengths of the respective first and second sealing members is greater than or about equal to a length necessary to maintain a second gastight seal between the first and second sealing surfaces when the first and second interlocking profiles are in the occluded state.