Every year, hundreds of vampires are lost to holy water. Well, not anymore! thanks to Unholy Water. It's so easy! Just open, pour, and shake, and all that holy water is no more! No more being tricked into drinking holy water when it blends in so well with any other bottle. You're safe with Unholy Water in just a shake. And if you call right now, we will include a free bat funnel for a mess-free guarantee. To order a four pack of unholy water for $7.95 plus processing and handling, call 040-666-VAMP that's 040-666-8267 or order online at unholywater.com. 

[This is not a real product, do not call this number or look up this website, they do not exist.] 

When given this prompt I remembered a reddit post that stated; if you have over half a container with holy water and fill up the rest of the container with regular water, the entire container will become holy water. I considered what the outcome would be if a vampire used this method in reverse and came up with the title 'Unholy Water' which became the basis of my project.