I drink tea all the time, literally. We get through 1500 bags a year plus I have an espresso machine, just to give you an idea of how much I consume.
My bottom front teeth were getting brown vertical stains on them, plus generally a bit dingy
All gone except for the nooks and crannies which I'll attack Monday night. Even dh is impressed.
99p in homebargains. You only use it twice a week so it should last ages.