Start with the roast, not the bag
Coffee packaging has one job: hold the product in the state the roaster intended. Roasted beans release carbon dioxide for several days after the roast, and they also take on moisture and odours from the surrounding air. The bag has to let gas out without letting air in, and it has to keep oxygen away from the oils that carry aroma. That combination drives most specification decisions before print or pouch style is even discussed.
The practical starting point is the degassing curve. A bag filled within hours of roasting needs a one-way valve so carbon dioxide can escape without inflating the pouch or forcing seams. Coffee rested for a day or more before packing has a lower initial gas load, but still benefits from a valve if the pack will sit on a shelf or in a warehouse. Buyers who skip this step often see swollen bags, broken seals or stale coffee within weeks.
Pouch formats for coffee
Flat bottom pouches stand upright on a shelf and hold a rectangular shape, which suits retail ranges where facing space matters. Stand up pouches use less shelf depth and are common for 250 g to 1 kg sizes. Side gusset bags give a more traditional block-bottom look and can carry higher fill weights. Spout pouches, including corner spout and STANDCAP designs, are used for liquid concentrates, cold brew and ready-to-drink formats rather than dry beans.
Flat and three-side-seal pouches remain the lowest-cost option for sample packs and single-serve formats. Rollstock film suits roasters running form-fill-seal lines, where the bag is made on the filling machine rather than supplied pre-made. Special shaped bags exist for gift sets and limited releases, but they usually add tooling cost and longer lead times, so they are best reserved for products with a clear shelf presence.
Barrier materials and what they block
The material structure determines how much oxygen and moisture reach the coffee. PET/AL/PE uses an aluminium foil layer and gives the highest barrier, which suits long shelf life and export shipments. PET/NY/PE replaces foil with nylon and offers strong puncture resistance and good oxygen barrier without a metallised look. Kraft paper laminates give a matte, natural finish and can be combined with an inner barrier layer, but the paper alone is not a barrier.
For recyclability, mono-material PE and PP structures are designed to pass through polyethylene or polypropylene recycling streams, though local collection rules vary. PLA/PBS compostable options and degradable films are available for brands with specific disposal routes. None of these structures should be chosen on the label claim alone. The barrier requirement, fill weight, shelf life target and distribution conditions decide which structure is technically suitable.
Filling, sealing and the add-ons that matter
Filling method affects the pouch specification. Manual filling into pre-made pouches needs a wide opening and a stable base. Automatic form-fill-seal lines need rollstock with consistent web tension and seal layers matched to the machine's temperature and dwell settings. Valve placement also matters: a valve fitted near the top seal can interfere with the fill path, while a valve placed too low may sit under the coffee and clog.
Common add-ons include a zipper for resealability, a tear notch for opening without scissors, a window to show the roast, a carry handle for larger formats and a hang hole for retail pegboards. Each addition changes the converting process and the unit price. A zipper plus valve plus window on a small pouch can add more cost than the barrier film itself, so it is worth deciding which features the customer will actually use.
Print methods and cost drivers
Rotogravure printing runs up to 10 colours and gives consistent, high-resolution results on long runs. Digital printing avoids plates and suits shorter runs, versioned artwork and test launches. Flexographic printing sits between the two and is often used for simpler designs. The choice is mainly a function of order quantity, colour count and how often the artwork is likely to change.
The main cost drivers are print method, order quantity, material structure, pouch format and add-ons. With digital printing, pouches can start from 100 pcs and film from 10 kg. With rotogravure, minimums are typically from 10,000 pcs or 200 kg. Lead time follows the same split: digital runs take 10-15 working days after artwork approval, while rotogravure takes 20-25 working days. Free stock pouch samples are available; the customer covers courier only.
Mistakes buyers make
The most common mistake is specifying a bag before defining shelf life and distribution. A pouch that performs well in a local cafe may fail after a month in a warm warehouse. Another is choosing a recyclable or compostable structure without checking that the local waste stream accepts it, which turns a sustainability claim into a liability.
Ordering too few units for a rotogravure design and paying plate costs twice - Forgetting that valves and zippers change the fill line setup - Approving artwork without a physical sample check - Assuming all kraft paper laminates have the same barrier - Leaving no headspace for degassing on freshly roasted coffee
A short specification sheet covering fill weight, roast rest time, target shelf life, distribution climate and filling equipment prevents most of these problems. It also makes quoting faster, because the supplier can match structure, print method and quantity to a defined requirement instead of guessing.