I have several reasons for wanting a water system over cups. First, if I ever have to travel and leave my parrot with a relative or a professional parrot sitter, I don’t want my parrot sitter to have to worry about the headache of spilling water and the cleanup that entails. More importantly, I want one less headache and a dry cage is easier for me to clean than a wet one. Also, dry habitats are less likely than wet ones to harbor bacteria and fungi, some of which are parrot life threatening. A dry cage is also less likely to rust and rust increases the chance of metals leaching out of the powder coated paint, which I am guessing might increase the chance of metal toxicity in my parrot. Can anyone tell me which brand of water system is best?