As explained in "Introduction: The Cigarette Camps" at the website, The Cigarette Camps: The U.S
The only flexibility is that the user can change the whole tank including the coil with a new one as well as changing the liquids of different flavors and controlling the strength of nicotine (if applicable)

What Is Banned Menthol cigarettes Flavored e-cigarettes and vape juice (including any characterizing flavor other than tobacco) Flavored little cigars and cigarillos Flavored chewing tobacco and snus Tobacco product flavor enhancers Synthetic cooling agents that mimic menthol (closed by AB 3218 in 2024) Limited Exemptions State law carves out three categories that can still be sold flavored, but only by retailers with a state license: Loose-leaf pipe tobacco with characterizing flavors Premium cigars with a wholesale price of $12 or more, handmade, wrapped in whole tobacco leaf, with no filter or non-tobacco mouthpiece Hookah and shisha sold at locations that only admit customers 21 years of age and older at all times Important note: many California cities (San Francisco, Sacramento, Oakland, Berkeley, Santa Cruz, Burbank, and Palo Alto, among others) have local flavor bans with no exemptions
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The government is also believed to be considering a ban on displaying cigarettes in shops, despite fears that newsagents and convenience stores would face significant extra costs if restrictions on cigarette sales were imposed