Otterbox unveiled a new rugged case for the iPhone 4/4S that can withstand a 20-foot drop to concrete. It features a high-strength, reinforced, thermoformed plastic structure with exterior, rigid, silicone bumpers that absorb impact force. It is crush-proof—it can withstand up to two tons of pressure — and completely blocks dust and dirt. It also is waterproof—it keeps water out when submerged up to 10 feet deep for up to 30 minutes and has a built-in screen protector that is bonded to the case for a water-tight seal, the company said.