Founded in 2016, South African company  Black Insomnia shot to fame as producers of the ‘world’s strongest coffee’. Touting the product’s top spot on the caffeine scale, an official press release states: “None have been able to reach the unadulterated caffeine content that defines Black Insomnia, nor should any brand attempt to surpass this content in the interest of public health and safety.” The strongest roast available is at 702 milligrams per 12 oz cup – for perspective – a can of Coke only has 34 milligrams. The flavour of this constructed roast is best described as “indulgent, smooth, sweet and nutty”. Get yours now at amazon.com.