Josta was a soft drink brand that was produced by PepsiCo and the first energy drink ever introduced by a major US beverage company. It was marketed as a "high-energy drink" with guarana and caffeine.

Josta was introduced in 1995, but PepsiCo pulled the drink from its lineup due to a change in corporate strategy in 1999. Shortly before the beverage was discontinued, an "Association for Josta Saving" was started. A "Save Josta" campaign was also launched by fans of the drink; their website "www.savejosta.org" was defunct for several years but was reactivated in 2011.

A Pepsi, Ireland based company, PORTFOLIO CONCENTRATE SOLUTIONS UNLIMITED COMPANY has registered Josta as a soda and beer trademark in the US as of March 2023. No logo is yet shown.

Josta used the slogan, "better do the good stuff now." In a commercial for Josta, an old man speaks to a younger man; the older man tells the younger man about his life as a youth, and how he wished he had more fun.

A Josta drink appears in the 2021 Disney+ series Loki.

An advertising poster for Josta appears in Madison Square Garden in the 1998 film Godzilla.