Tap or Dechlorinated water

[Bogertophis]

... what i have also noticed is that my Burms, coastals, etc will drink the droplets that remain on the sides of the enclosure so i wanted something real pure and uncontaminated for that reason too

Most snakes will drink water droplets. I think it's pretty cute, but in the wild it's a necessity to drink off leaves etc. They'll also drink water drops off their own coils- -it's like, whatever works.