Tobacco smoking is well known to be a major risk factor for various cancers, lung and cardiovascular problems, and is also linked to other health problems, such as complications in pregnancy, low sperm count in men, oral problems, and increased likelihood of cataracts
1 2 Reuters, US C$27 billion suit vs Big Tobacco starts in Montreal Archived 18 October 2015 at the Wayback Machine Class Action Litigation Tobacco-related Litigation in Canada, p.14 (page 16 of PDF)
The first that come to mind for me are Alexa, Google, Nike, Apple - each unique in their own way (hence, easy to remember) , less than six characters and easy to spell
I get on those video games
In addition, this particular brand of e-cigarettes is disposable, which means that you can simply throw it away after use