An accident can happen at anytime and the last position you ever want to see yourself is, is in a car that you are stuck in where water is quickly filling your vehicle. Even worse, a child or a loved one is also in the car with you. I now have one of these in both of my vehicles. No one ever wants an accidednt to happen but you need to be prepared. Keep one of these in your glove box or another easy to reach place. It will save your life! It is important to remember to hit the sides of the glass rather than the middle. These also come with a seatbelt cutter. Remember, in an accident or when your car is being submerged in water, you have seconds to get you and your passengers out, Act quickly and use the seatbelt cutter to get everyone out safely. I also LOVED the phone holder which works great! I have a magnetic backing on each of my favorite phone cases so I am use it where no matter what case I use! Such an awesome package!