Yeah...I've had that kind, it's okay I guess. But our preferred hot bitter drink over here is coffee--little more kick than hot tea.
Here's basically what our tea looks like:
We call it "tea" because it's made from tea leaves, probably similar to yours. Also probably a different breed, but you can achieve the same effect with your tea. Take 4 tea bags, mix them with perhaps half a liter of water, and heat it to boiling.
When it's hot enough, turn the heat off and let it brew for a bit. This varies on taste, but I like it between 10 and 15 minutes, or whenever I can get to it.
Longer is stronger, though you probably already know that. Pour it into a 2-liter jug, and mix between 1/4 cup and 3/4 cups of sugar. This part varies wildly--I like it at about a cup, but I have a pretty wide tolerance.
The hot water should dissolve the sugar pretty quickly, at least most of it. Add another 1.5 liters of cold water and mix until it's all dissolved, and voila. Add ice, or throw it in the fridge for a few hours.
It should keep for at least 3 days in the refrigerator. Some people make it weak enough to drink alone, some people make it strong enough you almost have to dilute it with ice. Some people mix it with lemonade, which is delicious. Some friends of mine (certainly not speaking for everyone here) call that swamp water, because that's what it looks like.
Try it sometime