Caffeine is a stimulant found in a lot of drinks. I chose it because I often need energy throughout the day and I drink caffeinated beverages frequently. Caffeine is composed of Carbon Hydrogen Oxygen and Nitrogen. Caffeine can be soluble in certain liquids and its melting point is 237 degrees celsius. Caffeine, usually found in drinks like coffee and tea is a stimulant, meaning it stimulates the brain and keeps you awake. Caffeine is relevant in our world in terms of offices and schools and regular day-to-day life. Stimulants have been used throughout history as a way to stay awake and be productive.