I'm going to share my special top secret recipe* with you all. You'll need a bottle of Cottee's Blueberry Cordial and a bottle of Sprite. Pour yourself a glass of Sprite and then add a little bit of cordial, mix it up and add some ice and there you have it - Blueberry Sprite! =p
*Not really special or top secret at all - I'm sure millions thought of it before I did.