Cut vinyl tubing into a 10-inch-long piece. For a connector, cut a 1-inch-long piece from smaller tubing that fits snugly into the longer piece. Slide the small piece 1/2 inch into one end of the longer piece. Use a funnel to fill the long piece with candy, beads, or glitter. Bend the long piece into a circle. Slide the open end over the exposed end of the connector to complete the bracelet.
Shrinky Dinks ring tutorial http://www.planetjune.com/blog/shrink-plastic-ring-tutorial/