Tired but Thirsty for Vending Machine Soda

So, yeah, I'm one of those night-shift people. You know, the ones who get to work at like 10 PM and stare at the same clock till morning? Well, there's this vending machine by my desk that sells the most overpriced soda ever. Like, $2.50 for a can! But man, when I'm running on five hours of sleep and my brain is as foggy as one of those mornings in Seattle, it’s like a siren calling out to me. Last week, there was an extra two dollars left over from the last paycheck so I splurged, I mean, invested in that soda. And oh boy, did I regret it by 4 AM when my bladder was telling me all about it. But here's the thing, I still have one more dollar for another can if I need it tonight. Can't quit you, vending machine, but at least we both know what to expect.