There will be several instances that your hands are full, so you need a simple tool to hold your car keys intact with your body. You can use a lanyard or carabiner to attach your car keys. If your car keys are still stuck in the ignition cylinder or in your car seat, these simple tools will serve as a good reminder.
Moreover, you can have a separate copy of your car keys for your lanyard and carabiner. A lanyard is a strap or cord made of polyester that is worn around your shoulder, wrist or neck. Meanwhile, a carabiner is a metal loop with its gate spring-loaded to automatically close after opening.