Latex balloons can be used for many years if properly stored. It is recommended to use latex balloons within two years after manufactured, as they will get brittle and pop the more years go by unused. Always store balloons in a cool, dry, and well-ventilated area. Optimum storage temperature is 68 to 72 degrees. Keep balloons away from any heat sources, such as motors and hot water pipes. Do not store balloons in a vehicle or garage where temperatures fluctuate. Balloons should be kept away from direct light sources, such as sunlight, incandescent lights, and fluorescent lights.