Every liquid shipment is designed around a simple assumption: sooner or later one will leak. The job of the packaging is to make sure that when it does, the leak is contained inside the parcel rather than spread across a trailer of other people's orders. Build in layers.
Layer 1: the primary container
Choose a container rated for the fill and seal it for transit. A cap that is finger tight on a packing bench will back off under vibration and can weep during the pressure changes of air freight. Common answers are an induction seal under the cap, a tamper evident shrink band, or tape over the closure. If the liquid is hot filled or carbonated, check headspace with your filler, because a full bottle has nowhere to expand.
Layer 2: secondary containment
A sealed poly bag around the bottle is the cheapest insurance in packaging. It keeps a leak off the printed carton, off the paperwork and off the other items in the parcel. For multi bottle shipments, bag each bottle individually rather than putting several in one bag, so a single failure does not contaminate the whole order.
Layer 3: absorbent
Include absorbent material capable of taking the entire contents of the largest container in the parcel, not a token pad. A leak that is absorbed is a refund. A leak that is not is a claim, a cleanup and sometimes a carrier conversation.
Layer 4: the outer box
This is where sizing matters:
- Measure the bottle capped, at its widest point and at its full height.
- Add the bag and the cushioning or insert on every face. A moulded pulp or corrugated insert that holds the neck and the base stops the bottle rocking, which is what causes seals to loosen.
- State the result as internal length x width x depth so there is no ambiguity on the quote.
- Specify board for the gross weight. A litre of water weighs around a kilogram before you add the container, so a six pack of bottles is a heavy parcel in a small box. Ask for the board grade and the maximum gross weight in writing.
| Shipment | Usual construction | Key risk |
|---|---|---|
| Single bottle, direct to consumer | Mailer with a fitted insert, bagged bottle | Rocking in transit loosening the cap |
| Multi bottle pack | Corrugated case with partitions | Bottle on bottle contact at the shoulders |
| Glass, any count | Heavier board plus a cradle or moulded insert | Impact at the corners and base |
| Pouches or sachets | Bagged, laid flat, light board | Puncture from adjacent items |
Check the rules before you build the box
Carriers publish their own packaging requirements for liquids, and they differ. Separately, flammable liquids fall under dangerous goods rules, and alcohol shipments require licensing and carrier approval in many places. We make the packaging. We do not certify that a shipment is compliant, so confirm the requirements for your liquid, your route and your carrier before committing to a format.
Ordering, minimum and turnaround
Minimum order is 100 boxes, from about $0.48 per unit at bulk volumes, confirmed on your written quote. The die and plates are included along with design support, US shipping and a digital proof before anything prints, so an insert cut to your exact bottle profile costs no more to tool than a generic one. On liquids that is the difference between a bottle that is held and a bottle that rattles.
Turnaround comes in three lanes: rush (expedited production with air freight), standard (air) and cost saver (sea), from about 7 business days plus 2 to 5 for delivery, with specialty imported items up to about 12 weeks. Rush adds about 7 to 25% depending on the job. Our plants are in West Chicago and Guangzhou. For wine and spirits specifically, see our wine box buying guide.
Send the bottle dimensions, the fill volume, the pack count and your route, then request a quote. If you have had leaks before, tell us where they happened, because the failure point usually tells us which layer to fix.
