Gas cylinder

A gas cylinder is like a big, round bottle that has a special kind of gas inside. Think of it like a balloon, but instead of air inside, there's a gas that can be used for different things like cooking, heating, or welding.

The cylinder is made of steel, aluminum, or some other strong material that can hold the gas safely. There's a valve on top of the cylinder that controls how much gas comes out and when.

The gas inside the cylinder is under high pressure, so it can escape quickly when the valve is opened. That's why it's important to be careful when using a gas cylinder and follow any safety instructions that come with it.

When the gas inside is used up, the cylinder can be refilled or exchanged for a new one. This makes it easy to keep using gas in a safe and convenient way.