I haven't filled my dog's bowl with tap water since he was a puppy
Why would you not use tap water?
For a couple of reasons, the dog never liked the taste to begin with and it's much more cost effective to use a PET bottle.
It's good to provide fresh water for your pet. You seem to know what is best, so that's great. Keep it up.
Thanks.
I bet your dog really loves you. Do they know any tricks? Or could you tell me their name?