These For Life tea mugs are super handy! They come with an infuser and a lid. The lid has two functions. It serves as a lid to keep heat and steam in during steeping, and as a drip tray after steeping. The mug has a solid weight to it and the silicone grip around the middle helps protect your hands when it is hot. Their dimensions are 3.625" in width and 4.625" in height.