National Coffee Day comes once a year. However, that's not the only day people drink coffee. In fact, about 400 billion cups of coffee are consumed every year. Do you have any idea how many of those cups are yours? Some restaurants will give away Free coffee on Friday, September 29 to help people celebrate the day.

McDonald's, Dunkin' Donuts, Peet's Coffee and Krispy Kreme are just a few of the places that will give about coffee. Those who do not give away free coffee will honor the day by selling it at a reduced rate. Others will donate some of its coffee sales to charity groups.

Why coffee is so popular

Coffee has become one of the most popular drinks in the world. Some people can't start their day without it, and some people drink the beverage throughout the day with each of their meals.

The drink is so popular because of the stimulating effect it has on people due to the caffeine it contains. Research shows that it is a major export product that comes in second behind oil.

Drinking it is the major thing people do with coffee, but there are other things the product is used for. For instance, it brings out the flavor in some cake recipes. The grounds can be used as a rub to spice up steaks. You might like the smell of the beverage, but bugs, ants, and mosquitos don't.

Use it as an insect repellant.

Types of coffee

There are so many different types of coffee available to consumers. Starbuck is a billion-dollar chain with 24,464 locations all over the world. The company has capitalized on people's drinking habits and has every type imaginable. A person can go to any Starbucks and order from an extensive list of different coffees.

The Huffington Post once listed 38 different types. It also estimated that about 83 percent of the world's adults drink it even though they don't all drink the same kind or the same amount each day. Not only are there so many different types available, but they can also be prepared and presented in many different ways to satisfied every drinker's personal taste.

Therefore, coffee is never boring.

Usually, coffee is served hot, but it can also be consumed ice cold. Some drinkers have their preference depending on whether they want it with or without sugar and cream or if they prefer to drink it black.

No matter what kind you drink or how much you drink, enjoy National Coffee Day. Whether you use it to start your day or to keep going throughout the day, know that millions of people around the world are taking a coffee break along with you.