When we got our two cats (they were buddies in the shelter, so they came in a bundle) one was super scared of everything. The first two weeks we only noticed his presence in the middle of the night, when he came out of hiding to eat. Then he started drinking out of my water cup, which is on my desk next to me. A year later I’m drinking out of a bottle and he has still his favorite cup on my desk :) the other one is using a fountain.