Magic Water Balloons Refill Kit-500 PCS-Refill Your Used Bunch Of Balloons Quickly Pakage:including 500 pcs biodegradable balloons, 500 pcs rubber bands, and convinent refill tools Do it yourselft, refill your used straw . The kit works well with all magic water balloons straws. New version rubber bands keeps balloons securely sealed and prevents leakage.