Flexible package and method of making same

A re-closable package, comprising:

• a plurality of walls that cooperate to define an interior volume of the package, wherein the plurality of walls are formed by a first flexible sheet and comprises an opening wall comprising an opening defined in the first sheet;
• a first engagement feature in the opening wall defined by one or more of (i) a thermoformed portion of the first sheet that extends above the plane of the opening wall and (ii) a thermoformed portion of the first sheet that extends below the plane of the opening wall toward the interior volume of the package;
• and a lid member defined by a second flexible sheet and having a first surface and an oppositely disposed outer second surface, wherein the lid member movable between a first position in which the first surface of lid member covers the opening and a second position in which the lid member is disposed away from the opening allowing access to the interior volume through the opening, the lid member comprising second engagement features defined by one or more of (i) a thermoformed portion of the second sheet that extends above the plane of the lid member when the lid member is in the first position such that the second surface of the lid member has an outward projection and (ii) a thermoformed portion of the second sheet that extends below the plane of the lid member towards the interior volume when the lid member is in the first position such that the second surface of the lid member has an inward depression, where in the first and second engagement features are the only thermoformed portions.