Homdox 4L Ultrasonic Cool Mist Humidifier, Aroma Essential Oil Diffuser Zero Noise, Built-in Water Purifier, Waterless Shut-off, Night Light Function for Home (3) Made of rust-proof stainless steelhealthy and durable Suitable for cups and flasks with a diameter from 6 to 8.5 cm Let boiling water settle about 15-20-second before pouring,Dishwasher safe Wash hand simply under running water Perfect for Single Cup Loose Leaf Tea