Inflated Size: 24 inches Fill Options: Air or Helium (to float) Ships: Uninflated Features: Self-Sealing Valve Double Bubble Balloons feature a clear, see-through stretchy plastic outer balloon with a second balloon (latex or foil) floating inside. They include two self-sealing valves, one for each balloon. To inflate, first inflate the Double Bubble slightly to allow room for the foil balloon to be inflated. Then inflate the foil balloon inside. Finish by fully inflating the outer Double Bubble.
