Maybe you should have a water instead

You're wandering around town, starting to feel a little thirsty. Suddenly, you spot a drink machine. You feel around in your pockets. You're in luck! You have just enough change for an ice cold Pepsi. Perfection, right? 

Not so fast, bucko. Take a closer look at the dispensing chute on that machine.

That's not a Mountain Dew.

So, let that be a lesson to you. Always look before you reach. The unwary could loose a finger to that clever, vicious squirrel.