Paperboard trays with recyclable interior liner forming leakproof corners

A blank for a food-containing tray, the blank comprising:

• a. a first material layer including a central section and a number of foldable sections each connected to the central section and each including a free edge opposite the central section;
• b. a second material layer applied over the first material layer to enable the second material layer to form leak-proof corners when the foldable sections are folded relative to the central section;
• and
• c. at least one aperture in the first material layer that extends completely through the first material layer and is covered by the second material layer,
• wherein adjacent foldable sections are engageable with one another,
• wherein a first foldable section includes at least one locking flap thereon, the at least one locking flap engageable with at least one second foldable section,
• wherein the at least one locking flap defines a window between the at least one locking flap and the central section, and wherein the second material layer covers at least part of the window and the at least one locking flap,
• wherein the at least one locking flap extends outwardly past the second material layer,
• wherein the at least one aperture is disposed within the central section of the first material layer, and
• wherein the at least one second foldable section provides a stacking tab over and spaced from the central section in the folded configuration.