Tea kettles

I have a tea kettle in my office — but not in my floor. And not one that makes such a delightful noise when it comes to the boil. This hearth is set into the floor, there is a tiny charcoal fire underneath the cast iron tea pot and is hisses and burbles and sounds much like the wind through the pines. What I could use in my office is a mizusashi, a stoneware jar to keep extra water!