But have you ever wondered just how much caffeine is packed into those tiny 2-ounce bottles? Let's dive in and find out! Understanding 5 Hour Energy: A Brief Overview 5 Hour Energy is a well-known brand in the world of energy shots. It was introduced in 2004 by Living Essentials, LLC. This drink is marketed as a quick pick-me-up to fight fatigue, improve focus, and enhance overall...