< View the rest of our shop You cannot add "Mad Squirrel. Constant Variables V3" to the basket because the product is out of stock. Double Barrelled. The Blackcurrant One£5.24 Out of stock Description Description ABV 5.7% Blackcurrant sour. Kettle Sour – all the blackcurrants! Container size: 440ml can Related products Sour and Saison Vault City. Wee Vault Wagon CAN Pale Ale Stardust. Red Rocket CAN Stout and Porter Elusive Brewing. Morrisman Mocha Edition CAN Gifts and Merch Mad Squirrel. Pastry Pack (2022)