Battling my coke addiction

I have a can of coke everyday. When did this start? Not a clue - but definitely due to two factors: a.) they are half price at my place of work, and b.) because of my place of work. After all, as their 1963 slogan suggests, “things go better with coke”, and I need all the ‘better’ I can get considering the largest aspect of my job is customer service (no offence general public).