Bests & Worsts Reviews from Amazon

I purchased one of these through Amazon. I used this item a few times a day,and it appeared very good for a week or two. As I continued to use it, the metal edging around the stainless mesh began to turn black. The mesh is stainless, but the metal edging is not. I even checked it with a magnet. Eventually, the black discoloration began to darken the tea water as well. I am using this infuser for green tea, so the discoloration is not coming from the tea. Don't buy this item, I would recommend the "Progressive Stainless Steel Mesh Tea Ball" instead, also available at Amazon as I have been using it for a month with no discoloration.