Tea in a coffee pot actually works
I have an insulated stainless steel "coffee" pot that I use solely for tea (it has never been used for coffee). No need for a tea-cosy, and simply push the plunger to effectively stop the brewing process when it is strong enough. If I am feeling posh and want loose-leaf tea, I use my thetiere which works on a similar principle
But milk in the pot - NEVER!!!!