The difference that matters is the dose, not the shape
A stick pack is narrow and tall; a sachet is wider and shorter. That sounds cosmetic, but it changes how the product falls, how it seals, and how the customer uses it. The shape follows the dose, not the other way around.
Stick pack wins on free-flowing, single-use doses
Powders like coffee, instant drink, and many supplements pour cleanly into a narrow stick and the customer empties it in one motion. Stick packs also mate well with slim auger filling and give a tidy, modern shelf look. If your dose is small and free-flowing, stick pack usually wins.
Sachet wins on larger or awkward doses
Granules, thicker powders, pastes, and anything near 5 to 20 grams sit better in a sachet. The wider web gives the filler room, and the seal area is easier to keep leak-tight on sticky product. For many oral-pouch and condiment doses, sachet is the safer run.
Think about the filler before the format
Your filling principle decides format tolerance more than marketing does. Auger filling likes consistent powder; volumetric cups like free-flow granules; pump filling owns liquids and pastes. We map filler to product first, then pick the format the filler runs cleanly. Our machine range shows which filler ships with which format.
Changeover is the hidden cost
Running both formats means two film widths, two former sets, two timing recipes. If volume is lopsided, run the small one as sachet and the big one as stick, but keep the dominant format on the dedicated line. Do not buy a Swiss-army line that changeovers all day.
Our rule of thumb
Under 3 grams and free-flowing, lean stick. Over 3 grams, sticky, or paste, lean sachet. Between them, the filler decides. If you are not sure, send us the product and dose and we will tell you which former to spec, not just which bag looks nice. More on format trade-offs in our supplier guide.