I'm super sad that this thing is a zillion dollars. Mom has one, which she "earned" for hosting a party.
http://www.princesshouse.com/products/product_detail.aspx?pid=363
I put 5 mint leaves and a bag of tea in then fill to the top of the bulbous bottom, then let the water boil to bubbling. I steep the infuser three or four times just to get the juices out, let it sit a minute, then pour.