I made this tumbler to try to practice dragging stringer lines with simple swirls of color rather than actual stringers. To make a stringer, you need to have a piece of colored glass hot enough that it will stick to a punti, which means putting it in the annealer, which takes more foresight than I put into this.
I put two different colors on the marver table, but I don’t think I arranged them in rows or anything, just had two different frit sizes for the ivory and blue adventurine. Spinning it against the tip made the stripes, and dragging it with a hook made it swirled.