I already owned the Urban Tea Tumbler and wanted a second infuser so I could switch between teas without washing one right away. This is exactly the stainless steel infuser meant for that tumbler, and no other parts are included, which was clear before I ordered. The 18/8 304 food-grade stainless steel feels solid and doesn't hold onto flavors from the last brew. It fits the tumbler properly and rinses clean easily. Good replacement part if you already have the tumbler and just need the metal infuser on its own.