[Tidybuoy]

I need to drill into the marble tile bathroom I just finished. Primarily for towel racks, toilet paper holder, and pedestal sink.

I'm not sure what type of drill bits I should use. I will definitely practice on a scrap piece of tile first, but I thought I would enquire here as we seem to have a lot of experts on the forum. One worry I have is that I think I should be cooling the bit with water but I will be drilling on a vertical wall.

I'm open to suggestions - Thanks!