Inside insulated coffee cups are becoming increasingly popular.

And according to a study, a lot of them are just plain boring.

The researchers from the University of Michigan looked at the cup dimensions of different insulated coffee cans and found that they were either too big for most people or they didn’t fit any of the major cups.

The study, published in the journal Journal of the American Medical Association, found that, among adults in the United States, an average of one cup of coffee contains approximately 1.5 grams of sugar, or about 10 percent of the daily recommended daily intake for people with a normal daily intake of sugar.

The American Heart Association recommends that people with higher blood sugar levels should limit or eliminate sugary drinks.

That would mean an adult who drinks four cups of coffee a day should cut down on their sugar intake by 40 percent, or by more than a cup a day, according to the AHA.

The cup size also affects the overall health of the coffee, as it reduces the amount of sugar absorbed by the coffee beans, according the study.

The average American drinks about 10 cups of caffeinated beverages a day and that number could be much higher.

So why are so many of us still choosing to drink coffee in the cups we already have?

Here’s what we know about the health benefits of the most popular cups.

1.

Coffee Cans are Better at Preventing Diabetes and Heart Disease The most popular coffee cups used to be the same size as your standard coffee cup, but research shows that the more your body weight, the bigger the cup you get to drink.

In a 2013 study, researchers found that people who drink three cups of a coffee a week were 30 percent less likely to develop diabetes and 80 percent less at-risk for heart disease than people who drank less than one cup a week.

2.

Coffee Can Keep Your Fat Burning and Keep You Slim The more fat you have, the more likely it is that you will have diabetes, according Dr. Elizabeth Campbell, a clinical nutritionist and researcher at the University College London School of Medicine.

In fact, a 2015 study published in The American Journal of Clinical Nutrition found that a cup of hot coffee with two ounces of fat is linked to up to 60 percent lower risk of type 2 diabetes.

3.

Coffee Lowers Blood Pressure by Up to 40 Percent The best thing about coffee is that it has a variety of antioxidants in it, which help lower your blood pressure and prevent stroke, according Campbell.

“The fact that you can drink two cups of tea and have three cups that are high in sugar and high in fat is a huge advantage,” she told Business Insider.

“That is a benefit that goes way beyond caffeine.”

In a 2016 study, Campbell and her colleagues also found that coffee contains antioxidants that could help lower blood pressure, including antioxidants like polyphenols, anthocyanins and lutein.

It also contains compounds that are associated with better blood clotting and blood flow, which could help with the formation of blood clots, according a 2016 report from the American Heart Federation.

4.

Coffee Helps With Sleep, Too It is not only coffee that helps with sleep.

The research is still unclear whether coffee drinkers tend to have better sleep than non-coffee drinkers, but it is possible that it helps with the natural process of falling asleep.

“It’s not clear yet whether the effects of coffee on sleep would translate to better sleep,” Campbell said.

“But coffee has been shown to help with REM sleep.”

5.

Coffee May Reduce Depression and Anxiety It is a common myth that coffee has an effect on depression.

But research has found that caffeine has some health benefits as well.

In 2016, the British Columbia Centre for Addiction and Mental Health (CAMH) found that “drinking coffee for longer than one hour and then having a drink afterward may reduce depression symptoms.”

In another study, the researchers found coffee to be a “powerful antidepressant.”

6.

Coffee Increases Your Exercise Habits There is some evidence that coffee can help with your fitness.

A 2015 study from the U.K. found that exercise is correlated with caffeine levels in the blood.

According to Campbell, exercise improves your immune system, boosts your muscle mass, increases the number of red blood cells, and can help regulate blood sugar, blood pressure levels and cholesterol levels.

7.

Coffee Does Not Cause a Depression According to the American College of Sports Medicine, coffee is considered safe when consumed in moderation, which is generally defined as no more than two cups a day.

“If you drink coffee every day and you don’t have depression, it’s probably safe,” Campbell told Business Insiders.

“There are things in the coffee that can be beneficial that can help you.”

8.

Coffee Keeps You Fit You may not know it, but coffee has many health benefits.

“Caffeine is actually a natural way to lose weight, especially when you are active,” Campbell noted.

But there are many things that coffee will help with, including maintaining