A great product every vehicle should have is one I discovered on ebay. A multipurpose knife/tool.  It contains a glass punch,. seatbelt cutter and a karambit type knife all in one.  They come in police blue or firefighter red  This item is a must have for the safety of all vehicles and is available from about $7.00 to $10.00 and worth every cent.  Get peace of mind and obtain one of these for all those people you care about. .