Clairty Brew-in-mug Teapot Extra Fine Mesh Tea Strainer Infuser Steeper with Lid and Handle for Loose Leaf Grain Tea Cups, Mugs, and Pots Strainer made from lead-free Non-magnetic Stainless-steel,Incredibly fine mesh masking - even teas with really fine particulates (such as Rooibos and some green teas) leave almost no residue at the bottom of your cup Size:2.61" wide,4" with handle,2.95" deep,Perfect fit for almost most standard cups, mugs,- even fits in small teapot (and is large enough), if we have guests Let boiling water settle about 15-20-second before pouring,Dishwasher safe Let boiling water settle about 15-20-second before pouring,Dishwasher safe Warning:Use baking soda dissolved in warm water to clean tea stain as needed and Do not put on flame or heating element