Some items are just too vital to be stored where you might accidentally loose them. The safest place for vital equipment is hanging from a strong cord around your neck. Hanging them around your neck also allows you to easily bring them into service, and helps ensure they won't get left behind somewhere. If you store it in your pack and then get separated from the pack, you will have also lost the survival kit. The kit should contain the absolute minimum amount of gear you wouldn't want to be without.
Many items can have more than one use.
Seal the kit in a waterproof container. If you have prepared well, you won't have to open it. Learn how to make use of the survival gear. Nothing can substitute for hands-on experience. Keep a positive attitude and a will to survive.