Abstract: A container with adjustable inner partitions provides flexibility for holding different sizes of substantially rectangular products. The partitions also cushion the product to protect against damage from physical pressure exerted on the box. Within the four walls of a rectangular box, panels are aligned parallel to the top and bottom walls. Multiple slots are formed in the panels, said slots opposing each other to create pairs of panel slots suitable for receiving a partition perpendicular to the panels. Multiple pairs of slots formed in the panels enable dual partitions to be inserted between the panels at a variety of positions. Two partitions are inserted in pairs of panel slots providing an appropriate distance between the partitions to secure a particular size rectangular product in between the partitions. Each partition may be provided with a slot convenient for receiving an edge of the rectangular product, to hold the product in place.