Possible Clues:

• Smoke an e-cig
• Enjoy an e-cig
• Use an e-cig
• Puff on an e-cig
• Smoke an e-cigarette
• Use an e-cigarette
• Use e-cigarettes
• Use a Juul, say
• Neologism for the use of e-cigarettes
• Puff on a 2-Down