Place the raspberries in a fine-mesh sieve over a bowl. 

Using the back of a spoon, stir and mash the raspberries against the side and bottom of the sieve.

In a large pitcher add the water, lemon juice, vodka and raspberry purée. 

Stir in the sugar until combined. 

Refrigerate the vodka lemonade for minimum one hour. 

Serve over ice.