E-cigarette maker Juul Labs Inc’s revenue is expected to triple this year to about $3.4 billion following a profitable 2018, Bloomberg reported on Friday.

The vaping device maker revealed its first official growth figures last month, saying it made sales of over $1 billion in 2018, up from $200 million the year earlier. The soaring sales come even as a divisive debate rages on over e-cigarettes, which offer an alternative free of the cancer-causing chemicals found in cigarettes, but are often seen as spurring new nicotine addiction, especially among teens.