This adorable rainbow mixed heart sprinkles look just like the real thing! Made out of polymer clay, they are lightweight and easy to use. Simply adhere with your favorite adhesive. We also have sprinkles in several colors and shapes. Try topping our Decorate-a-cake stamp set with these fun embellishments! 1 heaping tsp packaged in a zip-top storage bag or Tiny Container storage box. These containers are the ones used in the Elizabeth Ward storage tray system that many crafters use for storage (but can be used without the tray as well).