I know you can just go and buy a bottle at the store, but why not make some at home! Funnel it into pretty bottles and refrigerate for up to 2 months!
Combine all ingredients in a blender and puree on high speed for 30 seconds.
Transfer mixture to an airtight container or glass bottle with a tight-fitting lid and store in the refrigerator for up to 2 months. Shake well before using.