Treasure Sphere

From Zelda Wiki.org

When a large enemy (such as a Moblin or Darknut) is defeated in The Wind Waker, occasionally it will leave behind a Treasure Sphere (instead of Rupees or hearts). These glowing glass-like orbs change color, cycling from green to amber to red, then back to green. When broken, a shower of treasure is released, such as hearts, Rupees, arrows, bombs, along with any spoils appropriate to that enemy (if they hadn't already been stolen with the Grappling Hook).

Unlike normal items, Treasure Spheres do not fade if they are not obtained immediately; thus, they can be left alone and be used later to obtain the items within.