Blackberry Shrub Cocktail

A classic Gin & Tonic served with berry infused, purple ice cubes.
N.B, If you would like a combination in the glass of colour and intrigue make 50% of your ice cubes purple (as above) and for the other 50% cut the berries in 1/2 and freeze into water for aesthetic.
Everyone loves a bit of finger food and designated drivers will appreciate some fancy soft drinks.
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