Fragile Item Fulfillment: Packing Glass, Ceramics and Liquids for DTC Orders

Candles, glass bottles, ceramic mugs, serums, fragrance, cold brew concentrate — a large share of direct-to-consumer catalogs is breakable, leak-prone, or both. These products sell well online, but they punish sloppy fulfillment. One cracked jar costs a replacement unit, a second shipment, a support ticket and often a review. And unlike a wholesale pallet, a DTC parcel travels alone through automated sortation, conveyor drops and delivery trucks, with no one handling it gently.

Fragile item fulfillment is less about buying better bubble wrap and more about making the right packing decision the default one, every time.

Where breakage actually happens

Small parcels are sorted mostly by machine. Along the way a package can be dropped from conveyor transfers, stacked under heavier boxes, and tossed into delivery vehicles. Breakage tends to come from a handful of predictable causes:

• Movement inside the box. Empty space lets the item build up momentum and strike the carton wall. Most breakage is the product hitting its own box.
• Corner and edge impacts. Items placed against the side of a carton take the full force of a corner drop.
• Crushing. An undersized or thin-walled carton collapses under the weight of parcels stacked above it.
• Contact between units. In multi-item orders, two glass items touching each other will often break each other.
• Leaks, not cracks. For liquids, the common failure is a loosened cap or a seal that gives under pressure changes, which then damages every other item in the box.

Packing rules that prevent it

Good fragile packing follows a few consistent principles, regardless of the product:

A simple floor test is worth more than a spec sheet: pack a sample order the standard way, then shake it hard. If you can hear or feel movement, the packing rule is not finished.

Choosing dunnage and cartons

There is no single right material; the choice depends on the product's weight, shape and value.

• Molded pulp or die-cut inserts hold a specific product in a fixed position. They cost more to set up but pack quickly and consistently — well suited to a high-volume hero SKU.
• Crinkle paper and paper void fill work for mixed catalogs and look good at unboxing, but need to be packed densely to actually immobilize anything.
• Air pillows are light and fast for void fill, but offer limited protection against sharp impacts on their own.
• Bubble wrap or foam sleeves protect individual items from contact with one another.
• Double-boxing — a packed inner box floated inside an outer box with cushioning between them — is the most protective option for high-value or very fragile items.

Carton choice is a trade-off with shipping cost. Extra cushioning means a larger box, and a larger box can raise the billable weight. Our guide to dimensional weight and carton selection explains how to find the smallest carton that still leaves enough room to protect the product.

Liquids need their own rules

Liquids fail differently from glass, and the damage spreads. A leaking bottle in a multi-item order can ruin every other unit in the box. Practical steps:

• Tape or shrink-band caps on bottles that can loosen in transit.
• Place each liquid item in its own sealed bag before it goes into the carton.
• Pack liquids upright and separate them from paper goods, textiles and anything else that absorbs.
• Flag products that may be regulated for shipping — some fragrances, aerosols and alcohol-based items have carrier restrictions that need to be reviewed before they ship.

Making it repeatable at a 3PL

A packing rule only works if it is applied on every order, on every shift, by whoever is at the station. That means it has to live in the system, not in someone's memory:

1. Flag fragile and liquid SKUs in the item record. The warehouse management system (WMS) can then display packing instructions on the pack screen and route those orders to stations stocked with the right materials.
2. Write the rule per SKU, with a photo. "Wrap in two layers, place in divider, fill voids, shake test" is far more useful than "handle with care."
3. Define rules for mixed orders. Decide what happens when a glass item ships with a heavy one — separate cartons, or dividers inside one.
4. Track damage by SKU. Damage claims and customer replacement requests should be traceable to a product, so you can see whether one item keeps failing.
5. Review packaging when claims cluster. Recurring damage on the same SKU usually means the rule needs to change, not that the carrier got unlucky.

When damage does happen, a clear process for documenting it matters. Our guide to parcel claims and delivery exceptions covers what to capture and how to file.

What to agree with your fulfillment partner

Before you launch a fragile catalog with a 3PL, align on:

• Which SKUs are flagged fragile or liquid, and who maintains that list
• The approved packing method and materials for each flagged SKU
• Who supplies custom inserts or branded dunnage, and how much stock is held
• How damage is reported, and what photo evidence is captured at packing
• How packing rules change when a new product or new packaging arrives

If you sell glass, ceramics, liquids or other fragile goods direct to consumers, our DTC fulfillment team can review your catalog and set up packing rules per SKU before your first order ships.