this is so easy! and much better than store bought!
what you need:
lemon…s
simple syrup
water
ice
mint
vodka
frozen or fresh berries for fun!
in a pitcher, start with the simple syrup adding lemon zest. next add water and juice of lemons and then the mint and ice. and finally vodka and berries if you wish. proportions are as you wish really depending on how sweet or lemony you want it! you could maybe even skip the water and just go straight to vodka (perhaps i will try that next!)
you can also make a homemade simple syrup by boiling 2 cups of sugar and 2 cups of water. if you boil lemon peel with this, it is even more amazing!
Dear, US 
You had me at Vodka