Custom Flat Bottom Bags

Custom Flat Bottom Bags With a Premium Box Shape

A flat bottom bag (often called a box pouch) stands square on the shelf like a small carton, but it ships and stores flat like a pouch. It gives you five printable panels instead of two, so the front can carry your brand while the sides hold origin notes, brewing instructions, nutrition facts or your story. That shape is why specialty coffee roasters, granola brands and premium pet food companies use it.

Mailer Boxes Co prints custom flat bottom bags in full color on every panel, with pocket zippers, degassing valves and kraft or foil films to suit what you pack.

Why the Shape Matters

Because the base is square and rigid when filled, a flat bottom bag does not slump or tip like a gusseted pouch. It lines up neatly on a shelf, looks larger than it is, and the side panels face the shopper when bags sit side by side. It is also easier to fill on a line, since the bag stays open while product goes in.

Freshness Features

• Pocket zipper: hidden under a tear-off strip at the top, so the top of the bag stays clean for your design until the customer opens it.
• One-way degassing valve: essential for freshly roasted coffee, which keeps releasing CO2 for days after roasting.
• Foil barrier: the strongest protection against oxygen and light for long shelf life.
• Tin tie as a low-cost alternative to a zipper for a traditional look.

Materials and Finishes

Choose high-barrier foil laminate for maximum shelf life, metallized film for a lighter and lower-cost option, or a kraft paper outer for a natural, artisan look with the same food-safe lining. Soft-touch matte, gloss and spot gloss finishes are all available. If you prefer a side gusset bag, which costs less and packs tighter in cartons, see custom side gusset bags.

Popular Uses

Flat bottom bags are the standard for custom coffee bags from 12 oz upward, and they are increasingly used for granola, cereal, baking mixes, rice, pet food and premium snacks. Brands selling pet treats often choose them for larger sizes because the bag stands on its own in a pantry.

Designing for Five Panels

A flat bottom bag gives you more space than any other pouch, and the best designs use it with purpose. Keep the front clean and bold, with your brand and product name readable from a few feet away. Use one side panel for the story (origin, ingredients, why it is special) and the other for practical details such as brewing guides, nutrition facts or a barcode. The base can carry a pattern or a simple message customers see when they pick up the bag.

We supply a dieline that shows every panel, fold and seal so your artwork lines up perfectly across the corners.

Filling and Closing

Flat bottom bags arrive with the top open. Fill through the top, seal above the pocket zipper, and the customer tears the strip to reach the zipper. If you use a degassing valve, it is fitted during production on the front or back panel, so tell us where you want it before we make your proof.

Questions Customers Ask

Will a flat bottom bag stand when half empty?

Yes. The square base keeps it upright even when partly used, which is one reason customers like it in the pantry.

Can I get a window on a flat bottom bag?

Yes. Windows can go on the front or side panels, which works well on kraft bags for coffee beans and granola.

Is a pocket zipper better than a regular zipper?

A pocket zipper is hidden until the bag is opened, so the top stays clean and tamper-evident on the shelf. A regular zipper is slightly cheaper.

Bulk Pricing and How to Order

The price at the top of this page is our bulk price per bag in the smallest standard size; the table shows the price at every quantity. Valves, zippers and larger sizes are priced on your quote. Send your size and options on the form and we reply with your exact price and a free digital proof.

See all flat bottom and gusset bags or the full mylar bags range.