A modular box assembly includes a box with side panels defining a box cavity, a first thermal liner positioned within the box cavity, the first thermal liner including a first insulation batt disposed between sheets, the first thermal liner defining three first liner panels, at least one box side panel being covered by a first liner panel, and a second thermal liner positioned within the box cavity, the second thermal liner including a second insulation batt disposed between sheets, the second thermal liner defining three second liner panels. At least one other of the side box panels is covered by a second liner panel. The bottom box panel is covered by either a first liner panel not covering any side box panel or a second liner panel not covering any side box panel. Each insulation batt can be formed from a mixture of thermoplastic binder fibers and reinforcement fibers.

An inner box includes a center panel defining a plurality of vents, a first side flap panel attached to a first side of the center panel, a second side flap panel attached to a second side of the center panel opposite the first side of the center panel, a first locking panel on a third side of the center panel, and a second locking panel on a fourth side of the center panel opposite the third side of the center panel.

A tray includes an upper construct that includes an upper flange panel. The upper flange panel includes a perimeter portion extending at least partially around first and second openings. The upper flange panel further includes a central portion disposed between the first and second openings. The upper construct also includes an upper side panel foldably connected to the central portion. The tray further includes a lower construct. The lower construct includes a bottom panel and a plurality of lower side panels foldably connected to the bottom panel and defining a receiving cavity. At least a portion of the upper construct is attached to the lower construct. The upper side panel extends through the receiving cavity and is attached to the bottom panel. The upper side panel at least partially defines first and second cavities.