Lisa, my cats have had similar habits over the years. Henry, my 13-year old, used to lift the toilet lid up so that he could drink from the toilet. Gross, I know but short of weighing the seat down with something, there wasn't an easy way to stop him. When we moved, he stopped doing that (and promptly developed some urinary issues). He then started drinking from a plastic 4-cup measuring cup that we kept on the counter for filling the coffee maker. We finally got to the point where we just started using it as their regular cat dish. I'm not sure why he's so partial to it. We tried swapping it out for a heavier, glass measuring cup (so that the cats were less inclined to tip it over), but they didn't like it nearly as well. I just don't understand their kitty logic sometimes.
Izzy loves the sink and usually follows me into the bathroom anytime I'm in their. Trying to brush my teeth is a challenge at times. But I'm not sure she's really mastered how to drink from the faucet. Mostly she just likes sticking her paw into the stream. She gets wet and after we dry her off, she has a habit of running away at full speed and sliding all over our hardwood floors. It cracks us up.
I've had cats for 16 years now and they are an endlessly entertaining now as they were when I first got them. Just when I think I've figured one of ours out, he or she starts something new. Yesterday, Izzy got into a box of packing materials and carried bits and pieces of them around the house (picture a 8 pound cat walking around with a piece of bubblewrap twice her size).
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher