Riku Tea Infuser Strainer Extra-Fine Brew-in-Mug with Lid for Loose Leaf Teas 304 Stainless Steel HIGH QUALITY - Made of 304 stainless steel for longevity DISHWASHER SAFE - Easy cleaning in dishwasher or by hand EXTRA FINE MESH CONSTRUCTION - Excellent for any loose leaf teas LID IS ALSO A COASTER - After steeping, place the lid under the Infuser, to keep things tidy FITS CUP SIZES - 2.25"- 4" wide and at least 2.5" tall