The Ishanti drink company sells a type of popular energy drink. Advertisements for the company can be seen in Detroit, Hengsha, and Prague, suggesting that Ishanti is a multinational corporation.
Not much is known about the drink itself. The drink does not appear as a gameplay item in Deus Ex: Human Revolution or Deus Ex: Mankind Divided.
Ishanti Energy Drink advertisement in Human Revolution.
Ishanti drink advertisement in Mankind Divided.