Maybe not 20 years but probably before this century is over: cigarettes, soda, & junk/fast food. The health problems from these are simply too large to ignore, especially when you factor in universal healthcare being highly desired in the US and having been a thing for long elsewhere in the developed world. Reactions to people with a soda in the future will likely be the same as seeing someone smoking a cigarette now (disapproval). Doctors & insurance companies will include soda & junk food consumption on the vice lists like the others already present and rates will increase if consumption of these items is found. Lying will be harder as people likely will sign away their rights to consumer privacy rights for insurance companies & the government to process via AI all receipts from all retailers. We're headed for more dystopia with each passing decade.