HELIUM-FREE, RE-USABLE BALLOONS that create a fantastic visual display. A great investment for marketing your property. Specially-engineered plastics retain the balloon's shape and offset extreme temperature changes. Fade-resistant technology & specially pigmented polymers, will withstand nearly all inclement weather conditions. Dura-bonkers screw into the cup making them secure and theft-resistant. Store and reuse Durabonkers over and over. Say goodbye to helium forever!