Abstract: An insert for a rectilinear container having side walls, a bottom wall, and upper end panels defining an inner chamber includes a corrugated cardboard insert configured to secure at least one item within the inner chamber and provide cushioning thereto. There is a first panel having a bottom panel portion, a first side panel portion, and a second side panel portion. The bottom, first side and second side panel portions including a plurality of laterally corresponding parallel spaced ridges and channels. Interfaces between the bottom and side panels being pivotable such that the side panels can pivot at an angle relative to the bottom panel. When the insert is inserted into a rectilinear container, the bottom panel portion contacts a bottom wall of the container, the side panel portions pivot to a generally perpendicular angle relative the bottom panel portion to contact the side wall portion of the container to secure and cushion an item placed therein.