Oneisall 4 Pack Cat Water Fountain Replacement Filter for CW-05/CW-04 Cat Fountain, White

The drinking dish is stainless steel. it's easier to take apart easy to clean. and then wickedly hot weather you can put less water in a big chunk of ice. an extreme temperatures you can have it plugged in and running 24/7. in normal temperatures you can run it with the sensor. and the charge last forever that way. my cat is a rescue cat she's skittish. but even she took to this water fountain very well. I like the idea of those two different filters working together to give her the cleanest water possible.