The alcohol Cameron drinks at the beginning of the film is clearly a Dasani water bottle. He even grimaces when he drinks it as if it's alcoholic. However, it's possible that it's vodka in a water bottle or that he's attempting to hydrate after a night of excessive drinking.
Despite an assortment of flyers being strewn about the floor, there is little to no indication that a booze-fuelled party took place in the house.
The alarm clock cuts in and out when it goes off, revealing it to be a looped stock sound effect.
Cameron (Charles Purdy) is alerted to the potion being on his counter by the sound of a glass breaking in the kitchen. However, when he arrives, there is no broken glass or any indication that a window is broken, and it is never mentioned again.
Charles Purdy clearly stifles laughter just before picking up the phone to call his father.