In summer I make up a fruit and tea mix.

I put a couple of big spoons of loose leaf tea in the tea maker/strainer like one of these Tea Infusers for Loose Leaf , place that in the top of a thermos flask with chopped fruit like strawberries, or lemon or orange slices etc in the bottom of the flask, pour boiling water over it, cover and let sit until the tea is brewed, put the tea in a big 2 litre jar and fill with more boiling water. Refrigerate it and use about a third of a glass of that with some ice cubes and add plain sparkling or mineral water, with no added sugar.

It's refreshing, and I still get the tea flavour without drinking a full serving of tea, with the added joy of fruit flavours of my choice.