Sachet vs. Stick Pack: Which Packaging Format Is Right for Your Product?

Sachets and stick packs get treated as interchangeable in a lot of conversations, and mechanically they're close cousins — both are single-serve, flexible-film formats filled on similar equipment. But the shape difference changes more than the look on shelf. Here's how to actually choose.

The physical difference

A sachet is a flat, roughly square or rectangular pouch, sealed on multiple sides. A stick pack is a narrow, elongated tube, sealed top and bottom, typically torn open at one end. Both are formed, filled, and sealed in one continuous motion on a vertical or horizontal form-fill-seal line.

Fill weight and product fit

Stick packs are the default for free-flowing powders in smaller doses — think single-serve electrolyte mixes or flavor enhancers, typically in the 5–15 gram range. Their narrow shape empties cleanly with a single pour, which is exactly why they dominate the drink-mix category.

Sachets handle a wider fill weight range and are more forgiving with coarser particles, chunkier blends, or products that don't pour as freely — protein powders, meal-replacement blends, and anything with larger granules or mixed textures tend to run better in a sachet.

Machine speed and cost

Stick pack lines generally run faster for a given fill weight because the format is simpler to form and seal. That speed advantage narrows or disappears once you're filling heavier or coarser products that need a wider sachet opening to fill cleanly. In practice, the cost difference between the two formats at a given volume comes down more to your specific fill weight and particle size than the format itself — get both quoted against your actual product before assuming one is cheaper.

Shelf presence and use case

Stick packs read as "on-the-go, mix-into-water" — they're the visual shorthand shoppers already associate with hydration and energy mixes. Sachets read more like a "measured dose" or "single serving of a bigger product," and they give you more surface area for branding, instructions, or a nutrition panel if your label needs the room.

A third option: zipper pouches

For larger fill weights — multi-serving powders, anything a customer will scoop from repeatedly — zipper or stand-up pouches are usually the better fit. They cost more per unit and typically require sourcing packaging separately, but they solve the resealability problem that neither sachets nor stick packs address.

Quick decision guide

• Single-serve, free-flowing, under ~15g: stick pack.
• Single-serve, coarser texture or heavier fill: sachet.
• Multi-serving, needs resealing: zipper pouch.
• Not sure yet: run a small proof-of-concept batch in your top choice before committing to a full production order — it's a lot cheaper to find out your fill weight doesn't suit the format on a 500-unit test than on an 8,000-unit run.