22" Happy Birthday Music Notes Plastic Bubble Balloons Qualatex Bubble balloons are neither latex nor foil - they are made of see-through, stretchy plastic that will float for weeks! When fully inflated, bubble balloons are round with smooth, wrinkle-free seams providing a beautiful 3-D effect from every angle. This Qualatex is of the highest quality and can be filled with helium. Balloons add a festive touch to all your events!