Directed by Homi Adjania, the film, which also stars Saif Ali Khan and debutante Diana Penty, has been described as a story of friendship, love and loyalty.
Speaking to PTI Padukone said: "This film is very special to me. Personally it has been a journey for me as an actor as I have invested in this film physically, mentally and emotionally.
"I want people to enjoy and feel for the film as I do. I am not concerned about box office, I don't care how much money it earns. For me, money does not matter. I want people to enjoy the film. Critics and people enjoy it, in that case if the film earns money then that's good," she said.
The Race 2 actress was offered both the roles of Meera and Veronica, eventually choosing to play the latter. Speaking to Digital Spy, Saif Ali Khan described Veronica as "the wildest character you've seen in Indian cinema".
"This role was most challenging as I have come out of my comfort zone," explained Padukone. "I have taken a risk.
"When [producer] Dinesh Vijan asked me to pick up a role out of the two - Meera or Veronica - I thought I have already done something like Meera in Love Aaj Kal, so why to repeat same thing, hence I chose Veronica. Veronica is new and challenging," she said.
Cocktail releases on Friday (July 13).