I trusted all the comments of buyers of this product and I'm not disappointed! This teapot design is indeed the double wall prevents it from burning, all washes well, the product is light to wear. Indeed, I am a fan of loose tea, some deposits may appear in the cup for the finest leaves. The nylon filter darkens because of the theine but just to soak several hours in diluted bleach and it is like new! Would recommend to all addicts tea at any time of day.