This is one of those items that you hope you never have to use, but should still probably own. The 3-in-1 Car Emergency Tool by autoXscape is made from military-grade aluminum, and is fully waterproof. It features a

• High-powered LED flashlight (with 3 modes of brightness)
• High-caron steel seatbelt cutter
• and a tungsten window breaker

It's ergonomically crafted, with textured rubber grip that becomes handy in all sorts of nasty weather.