Mylar balloons are beautiful and great quality products. They last usually two weeks when inflated with helium and more than a year when it filled the air! These balls are "re-inflatable". The balloons in aluminium are printed for all occasions and are manufactured in various sizes. The small ball with 6-inch stem on the huge balloons 5 feet, larger than the child to whom you offer it, they als exist in the shape of all the characters in major films popular youth and most of the superheroes we all know.