Ever found yourself without a signal and wished you could just spray one on like magic? Well, maybe soon, you'll be able to do just that. Chamtech Enterprises has developed a spray-on antenna it says is more lightweight and energy-efficient than current technology. Revealed at Google's inaugural Solve for X shindig, the antenna can be "painted" onto almost anything, including trees, walls and fabrics. Chamtech's already talking with government-based customers, and as such can't spill too much detail on how it works, but said it uses organic elements to tinker with magnetic and radio-frequency fields. The start-up's CTO, Rhett Spencer, claims the antenna could increase mobile energy efficiency by 10 percent. It was also found to work particularly well under water, and being organic, we presume, would make it ideal for sub-aquatic telecom infrastructure, and of course, rainy days.