First Aid Essentials to Have On Hand in an Emergency. If you’re serious about safety, a well-stocked first-aid kit, kept within easy reach, is a must for every family. The Lifeline Deluxe First Aid Kit gives you 121 essential first-aid supplies to treat most common minor injuries, including cuts, stings, sprains, strains and more. Packed in a convenient, durable hard-shell foam case, this first aid kit is perfect for your car, bug out bag, or at home.