So what makes this mug so perfect? Well, aside from being the perfect size and shape, it comes with a fine, stainless steel infuser that fits right into it. Plus it has a lid, the ultimate tea-steeping accessory. Lids keep all the aroma and heat in the cup, for an even better tea experience. And when you’re done steeping, just use the lid as a little plate for the infuser – how perfect is that? Dishwasher safe. Microwave safe, except for metal infuser. (12 oz / 350 ml)