How to Ship Supplement Stick Packs Without Bursting or Bending

Supplement stick packs ship best inside a retail carton or resealable pouch, placed in a rigid mailer or small box that will not let them bend. Stick packs are light and compact, which keeps shipping cheap, but their seals can burst under pressure and individual sticks are easy to crush or lose.

Protect the Primary Package

Stick packs are thin sachets sealed at both ends and along one side. When a heavy item presses on them, or the package is crushed at a sorting facility, air and powder push against the seals. The weakest seal gives way and powder escapes. Loose sticks can also fold, which cracks the film.

• Retail carton: a folding carton of 14, 20 or 30 sticks is the strongest format. It spreads pressure and keeps sticks aligned.
• Resealable pouch: a stand-up pouch with a zipper works well for larger counts, but the pouch should fit the sticks snugly so they do not slide around.
• Seal checks: spot-check new production runs by gently pressing a few sticks. Weak seals from one run can cause a wave of complaints.
• Fill level: sticks with too much air inside are more likely to burst under pressure. That is a production setting worth discussing with your co-packer.

Choosing Materials and Mailers

• Rigid paperboard mailers: good for single cartons, since they resist bending and look clean on arrival.
• Small corrugated mailer boxes: best for multiple cartons or orders with other products.
• Padded mailers: acceptable for a single carton, but a soft poly mailer alone gives little crush protection.
• Kraft paper fill: a small amount stops cartons from sliding inside a box.

Box Size and Dimensional Weight

Stick packs are light, so dimensional weight almost always decides the label cost. The opportunity is to keep packages small and flat.

Worked example: a hydration brand sells a carton of 16 sticks that measures about 6 x 3 x 3 inches. Orders had been shipped in an 8 x 6 x 4 inch mailer box. Moving single-carton orders into a rigid mailer that fit the carton closely shrank the package, removed the need for void fill and still protected the sticks from bending. Two-carton orders went into a small box sized to hold both cartons side by side.

If you sell sticks loose by count, consider putting them in a small inner carton or sleeve even for direct-to-consumer orders. It adds very little size and prevents most bending damage.

A Pack-Station Checklist for Stick Packs

1. Confirm cartons are closed and not crushed at the corners.
2. Gently press one carton to check for loose powder, a sign of burst sticks.
3. Place sample sticks in their sleeve or envelope.
4. Choose the mailer by carton count, not by habit.
5. Keep cartons on top of, never under, heavier items.
6. Label the flat face and seal the mailer.

This quick routine catches most problems before they leave the building and keeps small, light orders inexpensive to ship.

Labeling and Inserts

Place the shipping label on the flat face of the mailer. Avoid printing or sticking anything on the sticks themselves. Useful inserts include:

• A mixing card showing how much water to use.
• A flavor guide for variety packs.
• A reorder or subscription prompt timed to the number of sticks in the order.

Choosing a Carrier Service

Because stick pack orders are typically light and flat, economy and ground services are usually the most cost-effective. Small, flat packages often qualify for lighter weight tiers with some services, so compare carriers on each order rather than defaulting to one. Faster services make sense mainly for customers who paid for speed.

Common Mistakes to Avoid

• Shipping loose sticks in a soft poly mailer with no inner carton.
• Using a box sized for bottles or tubs and filling it with paper.
• Tossing sample sticks loose in the box where they get lost or thrown away.
• Packing stick cartons under heavy items like tubs or glass bottles.
• Miscounting variety packs because sticks are picked one by one at the pack station.

Scaling Up With Samples, Variety Packs and Subscriptions

Stick packs are popular for sampling and variety packs, which means lots of small, precise counts. Rather than counting sticks at the pack station, pre-build variety packs and sample sets as kit SKUs, each with a defined count and sleeve. For subscriptions, set a standard mailer for each subscription size. For peak promotions, prepare kits ahead so pack stations only need to pick a single finished unit.

How Matrix Fulfillment Helps

Matrix Fulfillment packs supplement stick packs in an FDA-registered Los Angeles facility with lot tracking and FEFO picking. We build sample sets and variety packs as their own SKUs, add branded boxes, inserts and gift notes, and rate-shop every order across carriers to find the best option for small, light packages. Every pick is barcode-scanned in ShipHero WMS for 99.8% order accuracy, and orders placed by 2 PM Pacific on weekdays ship the same day.

Can I ship supplement stick packs in a poly mailer?

It is possible for a single retail carton, but a rigid mailer or small box gives better crush protection. Loose sticks in a soft mailer often bend and burst.

Why do stick packs burst during shipping?

Pressure from heavy items or crushing pushes air and powder against the seals. Weak seals or extra air in the stick make bursting more likely.

How should I ship stick pack samples?

Place sample sticks in a small sleeve, envelope or bag so they stay visible and protected, and set the sample set up as its own kit SKU.

What drives the cost of shipping stick packs?

Stick packs are light, so dimensional weight usually sets the cost. Small, flat packages that fit the carton closely keep costs down.

How do I keep variety pack counts accurate?

Pre-build variety packs as kit SKUs with a fixed count, so packers pick one finished unit instead of counting individual sticks.