A textile envelope comprises front and back panels formed of textile material having substantially the same peripheral shape, a sealing flap formed of textile material joined to a peripheral edge of the front panel, and a stiffener element situated between the front and back textile panels for stiffening at least one of the panels. A method of manufacturing a textile envelope includes the steps of situating a stiffener element between front and back panels formed of textile material, connecting overlying side regions of the front and back textile panels to each other, connecting a top region of the stiffener element to a top region of one of the front and back textile panels, and folding a sealing flap formed of textile material joined to a top edge of the front textile panel over the back textile panel.

A package container is disclosed which is for storing and transporting a blood vial in a secured position, the package container comprises a sheet of thermoplastic material formed into an envelope, a panel of bubble wrap material inserted into the envelope to form a first and a second pocket within the envelope, and a flap having an band of adhesive formed thereon for closing the envelope to close the pockets.

A single blank is used to make an expandable envelope construction having four side edges which can expand as the envelope construction is filled to capacity. The blank is provided with horizontal and vertical score lines and fold lines which permit the sides and bottom of the construction to collapse inwardly while the pocket enlarges in thickness and decreases in height and width. The blank has side flaps with corners at the ends which are overlaid by the back panel and closure panel in an unsecured manner to maintain the envelope in a sealed condition when expanded.

A nested safety mailing envelope having a first and second compartment. The first compartment is attached within the second compartment. Each compartment has a seal that may securely seal each compartment. The seals are in line such that the inner compartment seal may be closed and the outer compartment seal provides a secondary enclosure of the inner compartment.