It is prohibited to drink within 1,000 feet of all schools, places of worship, hospitals, homeless shelters, and substance management facilities. Also, you cannot drink on the street from a glass container. Plastic cups or cans are okay.
Openly drinking in public on Fremont Street is not only legal, it is encouraged!
Unlike most business in other destinations, Las Vegas casinos are okay if you bring in outside drinks.
Drinking in a cab or Uber is not technically illegal, although it will be up to the driver to decide.