Certified to military specs, Verizon's latest Push to Talk flip-phone is ruggedized against shock/vibration, dust, high or low temperatures, and altitude. It's also waterproof in up to one meter of water for about 30 minutes.
The Barrage has a large 1170maH battery, but otherwise seems like a tough-as-nuts version of Verizon's Motorola Entice. That means you get archaic clamshell specs like a 2-megapixel camera (with video recording), dual speakers, dedicated music controls, blah, blah. It'll also handle Verizon Wireless Services like V CAST video, Rhapsody and VZ Navigator.
If you work on an oil-rig, the Barrage is now available at Verizon for $130 (after $50 rebate; with 2 year contract). You can also make Push to Talk unlimited for an extra $5 bucks a month. [Verizon]