People use a glass bottle to make fire. 
People use glass bottles to make fire. 

A Molotov cocktail is a tool used to start fires. 

A fuse helps start the fire. A fuse is a way to light the bottle. Some use a cloth wick. Others use storm matches that do not blow out. To use it, a person lights the fuse. Then they throw the bottle at a target. When the glass breaks, the fuel spills out. The fire from the fuse hits the fuel. This makes a big fireball. 
The name came from a joke. During a war in 1939, people in Finland used the name. They were making fun of a man named Vyacheslav Molotov.
Many groups use these tools. This includes soldiers in wars. Some even make them in large factories. For example, the British made many during World War II. They used them to defend against tanks.
A Molotov cocktail is a hand-thrown tool used to start fires. 
The way it works follows a few specific steps. First, a person attaches a source of ignition to the bottle. This might be a cloth wick or special storm matches. These matches are useful because they do not blow out in the wind. Next, the person lights the fuse and throws the bottle. When the glass hits a hard surface, it shatters. 
The name has a very interesting history. It was created by people in Finland during the Winter War in 1939. They used the name to make a joke about Vyacheslav Molotov. He was a Soviet leader who made many radio speeches. Molotov claimed that bombs were actually food deliveries for starving people. 
Many different groups have used these devices throughout history. They were first used in the Spanish Civil War between 1936 and 1939. During World War II, many countries even made them in factories. Finland produced over 542,104 bottles by the spring of 1940. Great Britain also prepared them to defend against invasions. Even modern militaries sometimes use them when they lack other tools. In 2022, volunteer units in Ukraine used them during a Russian invasion. 
You might see these tools mentioned in history books or video games. In games, players often call them "Molly" for short. In real life, they are known by many descriptive names. Some people call them petrol bombs or fire bottles. Others call them "poor man's grenades" because they are so easy to make. They show how people use simple items to face big challenges.
A Molotov cocktail is a hand-thrown incendiary weapon designed to start fires. 
The mechanism of a Molotov cocktail relies on a specific sequence of physical actions. First, a source of ignition is attached to the container. This is often a cloth wick soaked in alcohol or kerosene, or sometimes specialized storm matches. The user lights this fuse and throws the bottle at a target, such as a vehicle or a fortification. Upon impact, the glass container shatters. 
Different versions of the device exist based on the desired effect. Some users add thickening agents to the fuel to change its properties. Substances like soap, tar, polystyrene foam, or rubber cement can be added to the mixture. These additives help the burning liquid adhere to surfaces rather than simply running off. Other variations focus on creating smoke rather than fire. "Smoke bottles" use a mixture of chemicals, such as sulfur trioxide dissolved in chlorosulfonic acid, to generate thick clouds. Unlike standard firebombs, these smoke bottles can react with the air and ignite automatically once the glass breaks.
The name "Molotov cocktail" has a unique and sarcastic origin. It was coined by Finnish soldiers during the Winter War in 1939. The name refers to Vyacheslav Molotov, who was the Soviet foreign minister at the time. 
Historically, these weapons have appeared in several major conflicts. They were used for the first time in warfare during the Spanish Civil War between 1936 and 1939. 

In military settings, the design can become quite sophisticated. The British War Office explored using white phosphorus as an ignition source. This led to the development of the Self-Igniting Phosphorus (SIP) grenade. This device used a mixture of benzene, water, and rubber in a glass bottle. When the bottle broke, the phosphorus was exposed to the air and spontaneously ignited. Some models also used ballast, such as sand, to improve the accuracy of the throw. Other designs used an internal ampoule of chemicals that would break and ignite the fuel upon impact.
Because of their improvised nature, Molotov cocktails go by many different names globally. They are often called fire bombs, petrol bombs, or gasoline bombs. In some regions, they are known as "poor man's grenades" due to their low cost. In video games, players frequently use the abbreviation "Molly." Despite these many names, the core concept remains the same: using a simple, breakable container to deliver fire to a target. They represent a way for people to use basic chemistry and physics to face much larger, more complex machines like tanks.
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