Designing Packaging Inserts That Actually Stay in Place

Inserts fail quietly: products rattle, edges chip, and customers question quality. Retention strategy should be defined alongside outer box dimensions.

Friction-fit paperboard trays work when tolerances are tight and products have flat sides. Test temperature and humidity swings if you ship nationally.

Glued dividers add assembly time at fulfillment but stabilize mixed-SKU subscription boxes. Specify glue locations on dielines to avoid misalignment.

Literature wells keep warranty cards and thank-you notes from sliding under products. Depth and corner radius matter for automated insertion.

Foam and pulp inserts protect heavy or fragile goods. Environmental positioning may favor molded pulp over petroleum-based foams when protection levels allow.

Color printed inserts can carry setup instructions or cross-sell offers. Keep ink coverage moderate to prevent warp on thin chipboard.

If inserts stack nested for freight, note orientation on POs so warehouses do not flip panels incorrectly during pack-out.

Revisit insert design when you change product geometry by even a few millimeters. Inserts are not interchangeable across generations silently.