The one, the only, the original Tennis Ball Saver from Gexco features state-of-the-art construction that creates a unique product for tennis lovers. Hold three balls under 14 PSI in this pressurized tennis storage system. The pressurization hold tennis balls under equal internal and external pressures ensuring no air will leak out of balls in good condition for a fresh ball every time you open the container! Never waste time or money on replacing your worn balls again! Save them and keep them fresh in the Tennis Ball Saver from Gexco.