Iced Tea should ideally be made with Darjeeling, Lapsang Souchon or Earl Grey leaves. Once your tea bush has reached maturity, pick only the top leaf shoots ( as in pinching out roses) and dry the leaves in the hot Indian sun. Alternatively, buy said tea types from your local supermarket, preferably in bag form.
Boil water in a kettle or saucepan to exactly 100 deg Celsius ( or Centigrade if you are British) and pour over your tea bag of choice in a mug of your own preference or design. Allow to infuse for a few minutes. 10 mins is good, 17.5 is critical if your'e British. Remove bag. Allow to cool until at room temperature. Then refrigerate (preferably in a refigerator - not by placing outside in Britain) for a week or so until frosty. Add sugar to taste but NO MILK (ugh!!).
Add a slice of lemon to the tea, which should be presented in a clear drinking vessel, or "glass".
Your beverage is now almost ready to drink, but hang on, there is no substitute for a really nice hot cup of tea so just pour the cold stuff down the sink as good for no-one but wimps and fashionistas.
Or, buy a bottle of Lipton's Iced Tea (Lemon, Raspberry or Peach flavours) and keep in the fridge. No commission or fee has been paid for this recommendation)
Yours etc., Brigadier Sir Arthur Strongbrew (Mrs.)