Element Case has introduced its Liquid case for the iPhone and iPhone 3G. The Liquid is a unique case offering an inner layer of injection-molded, transparent, back-painted polymer, a molded polycarbonate bezel that keeps the phone secure in the case, nickel-plated fasteners that hold the case together, a translucent acrylic lid that protects the phone’s screen when attached and can be stuck on the case’s back when the phone is in use,…