One of my favorite papers to design with is “Kraft”, a strong brown paper or cardboard made from wood pulp.
Not only can you use recycled materials like cardboard boxes and grocery bags but you can also buy kraft paper for sheet-feed through laser printers. It is also available as a crack-and-peel stock for laser or conventional sheet-feed press printing.
A favorite source for short-run projects is labels by the sheet.
There is no minimum order and you can buy a single sheet if you want. They have a lot of other nice stuff there, too, besides kraft.
What follows is an identity based on Kraft and handmade collateral materials to give you a spark.