My favorite tea of course is Early grey - with a bit of milk, no sugar, and in a massive cup.  At work though, I stay away from teas with milk, and instead just drink endless cups of black/ green/ other teas without milk or sugar.  I just opened up a box of "Tetley with LEMON natural flavour" tea - and it's absolutely outstanding.  Perfect tea to drink at work, enough tannins/ bite that get the full tea effect, and lovely lemon flavoring to add that flavor.  The best part of this box is that the tea bags are individually bagged, meaning longer shelf life.