Cool Easy Drink

Last Shabbos (Sat.)the kids were drinking a bottled lower-sugar drink, called "Lemon-Nanna" (mint). I had a smidgen of a taste--and liked it.
Ican make that! And I did.
Take one good bunch of mint (I use the specially grown "buggless" variety), wash it and rinse. Put in a saucepan with enough water to barely cover the mint.Bring to a hard boil, cover, turn down the heat and simmer for 20 minutes. Let cool. Then remove the mint leaves (squeezing them to get the juice out). Squeeze several lemons (5-6?) and add the juice to the mint-water. Re3frigerate this concentrate.
To make a liter and a half of drink. Fill a bottle nearly full with water. Using a funnel add:
1 teasoon sugar (for the whole bottle)
2 teasoons liquid sweetner
a bit of the concentrate.

Refrigerate!
Even in the frigerator, this goes off rather quickly. Better to do this recipe in thirds (or fourths) unless you have a REAL crowd around.