Just a suggestion- don't do that.First, because snakes don't drink that much water, so most of that is wasted (being so diluted) in a bowl of water. Also, it's going to go bad (encourage bacteria in the water) if you don't change water daily.
Better way: Install the vitamin (whether it's powder or droplets) into the dead rodents mouth right before you offer it. I'm assuming you're feeding dead (f/t or fresh) rodents, but if not, don't bother doing this until it is. Live rodents have plenty of vitamins, & putting supplements on their fur- well, mostly that just falls off, but it also makes the rodent smell "different" & wouldn't you know it, some snakes would refuse to eat on that basis- not that BPs are finicky or anything.![]()