Molded Pulp Inner Packs for Ecommerce Mailers: Small Products, Serious Protection

Small products like bottles, electronics, and ceramics rattle inside mailers unless something fills the void. A molded pulp inner pack sized to the mailer locks the product in place and turns a flexible mailer into a rigid package.

The Scenario: A serum brand that stopped padding its mailers

A DTC skincare brand was shipping 30 mL serum bottles in poly mailers padded with two air pillows and a corrugated sheet. Fragile-item return claims were running at 3.5% of orders, and customers complained about the waste.

Pain Points

• Air pillows deflated in transit, leaving bottles free to collide;
• Mailer sizes varied, so one inner size never fit;
• Customers flagged the plastic fill as wasteful in reviews.

The Solution: An inner pack that fits the mailer and the product

The brand adopted a molded pulp inner pack with a single bottle cradle and a lid that locks into the mailer walls. One SKU replaced the pillow-and-sheet combo:

1. Formed product cradle The bottle sits in a snug cradle sized to its exact silhouette, so it cannot slide.

2. Mailer-locking lid The lid edge engages the mailer wall, making the flexible pouch rigid.

3. Drop-tested to ISTA 6 The pack passed ISTA 6 Amazon-style parcel testing without damage.

The Result: Claims down, parcel size down

Fragile-item claims fell from 3.5% to 0.6% within two months. The mailer shrank by one size, cutting dimensional weight, and the brand removed all plastic fill from the pack.