Create a custom t-shirt campaign for free at Bonfire.com. Upload art or design your shirt online & sell to your community for a good cause or for profit. HOW IT WORKS 1. Browse a curated selection of premium shirts, hoodies and more to find products you'd like to sell. 2. Upload artwork or use the full-featured design tool to create your art. 3. Set your selling price. 4. Set your campaign dates, anywhere between 7 and 21 days. 5.Customize your page. 6. Promote and sell. 7.