Take all these ingredients and put them in a blender. They should be fully liquified.
Pour mixture into a glass jar, and put in the refrigerator for at least 2 days.
Strain into a new and clean glass jar.
Once your blueberry shrub is ready. Put 1.5oz of vodka and the blueberry shrub into a shaker tin. Add some ice as well. Then, shake.
Use a strainer and pour the mixture into a barrel-style copper mug .
Top it with a ginger beer. Garnish it with blueberries and a lime wheel.