As a developer, I spend most of my time in front of a screen. So I wanted to challenge myself to make something physical — and ideally, something useful. That turned out to be custom-printed tote bags with a flat bottom.
What started as a weekend experiment using vector software and a heat press turned into a micro-business powered by digital design and physical creativity.
Why Flat-Bottom Tote Bags?
Unlike traditional flat totes, these have structure. They stand up, hold more, and feel more premium. Better yet, they’re the perfect canvas for sublimation printing, a process that bonds your design directly into the polyester fabric — resulting in durable, full-color artwork.
My Setup
Here’s what I used:
Blank polyester tote bags from sublimationblanksproduct.com
Converted Epson EcoTank with sublimation ink
Heat press (15x15-inch)
Basic sewing machine (for the flat bottom structure)
Affinity Designer (you can use Figma/Illustrator too)
How I Made It – Step-by-Step
Design the Art
I created custom vector patterns and mirrored them before printing. Sublimation only works on white/light polyester, so contrast matters.Print & Press
Print onto sublimation paper. Then heat press onto the tote at ~380°F for 45 seconds. The ink bonds into the fibers, not just on the surface.Create the Flat Bottom
Sew the bottom and sides, then “box” the corners: pinch them into a triangle, measure ~2 inches from the tip, and sew straight across. Cut the excess. You now have a structured base.Finishing Touches
I added a lining for premium feel and stitched reinforced straps.
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