“But keep in mind that anything based on dollar figures for sales masks declines in unit volumes of cigarettes given the ongoing price increases by the manufacturers.”

Sweanor said that even with Juul’s current reign atop e-cigs, competitors also had a sales increase in a rising-tide-lifts-all-boats scenario.

Vuse, the No. 2-selling e-cig by R.J. Reynolds Vapor Co., rose from 13.4% to 13.7%. Similar flavored e-cigs have not been pulled from retail by Reynolds Vapor.

Imperial Brands Plc’s Blu e-cig was at 4.8%, followed by Njoy at 3.1% and Japan Tobacco’s Logic at 2.5%.

Those products likely gained sales from Altria Group Inc. opting to stop production of e-cigs MarkTen XL and Green Smoke as part of its $12.8 billion investment in December for a 35 percent ownership stake in Juul.

“The uptick in Njoy sales in recent weeks corroborates reports that they now have a product that is competitive even with Juul,” Sweanor said.

“The success of Juul has created an environment where other companies can raise the funds necessary to engage in research and development, and product launches.