'World's strongest coffee'

A U.S. coffee company is claiming to produce the first and last cup of coffee ever needed to kick start your work day.

Death Wish, a medium-dark roast coffee blend roasted in Upstate New York, claims to be the 'most highly caffeinated premium dark roast organic coffee in the world.'

The brand, featuring a menacing black skull and cross bones, says they use coffee beans containing close to 200% of the amount of caffeine found in a typical coffee shop coffee.

In comparison, a tall, 12oz cup of regular Starbucks coffee contains an average of 260mg caffeine according to Energy Fiend, making the potentency in each cup of Death Wish approximately 520mg.

The coffee that sells for $19.99 per 1lb bag is organically grown, fair traded and shade grown to save more land, according to the company.

It's also said to have the full flavor of dark-roasted Arabica coffee beans without the loss of caffeine during its .

Explaining this as a rarity, Death Wish states that dark roasts typically contain less caffeine than lighter roasts due to the amount of time the beans are cooked.

'The longer and darker you roast the coffee bean the more caffeine gets pulled/cooked out,' they state on their website.

'I was zipping around like I was the Flash,' a satisfied user wrote of the product while giving it five out of five stars on Amazon.com. 'Not only was it one of the strongest coffees I've ever had but it is also one of the best tasting and smelling.'