QUICK FILL: Unleash the fun with speed and ease this summer with Bunch O Balloons; fill and tie 100 balloons in 60 seconds to start a tropical party in minutes Simply connect the stem to a tube and create hundreds of water balloons in seconds; yes, it really is that easy. SUSTAINABILITY: Bunch O Balloons stems and caps are made from certified, traceable recycled plastic; balloon pieces are made from "natural rubber", a material derived from plants Join us in unleashing a sustainable summer.