well, my personality leans towards magic, but just to be awesome and freak out my enemies, i would have a cannon which can fire whatever drink i wish it to, one where i can adjust the pressure of the blast.
two uses.
1: high powered vodka knocks my enemies out against the walls and disorients them because of the alcohol content (or sends them flying off of a building, but i'd try to avoid that one. it'd be really gooey and i don't like killing things)
2: on low-power, i can drink it (i would carry a self-cleaning cup). why not? i can choose the drink that i'm in the mood for and it won't leave me disoriented (because of alcohol). if i need a quick drink during a shoot-out (which i would because i never drink enough and my body is just about as efficient as using my drink cannon to try to defeat the sea on the water setting) or got trapped in the desert, then it could well save my ass.