Octal is moreish bits quite strong cocktail at 1.5 standard drinks. Stirred with 30ml blackberry liqueur teichenne and 30ml gin dasher and fisher with 30ml blackberry juice as well as 100ml ice and good to have with brunch. Just place ice into mixing glass then add ingredients to mixing glass and gently stir. Strain into cold glass and garnish with black berries and served in a martini glass cold.