The world's strongest coffee, contains four times as much caffeine as regular blends, comes with a health-warning limit of two cups in a day, the Sun reported.
New York cafe owner Mike Brown, 31, has claimed that robusta beans brew with skull and crossbones on packets is the most potent for buying.
AdvertisementHe joked that the coffee is not made for weak people and may lead to sleepless nights.
Mike, who has been running a coffee company for six years, came up with the idea, after encountering costumers who craved a stronger caffeine hit.
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