Top off with Fever-Tree® Mediterranean tonic water. 3. 2. Fill a highball glass with ice. Garnish with a fresh slice of Lemon Position a spoon convex side up against the ice and pour 4 ounces tonic over it. The Lemon Gin & Tonic Fever-Tree Refreshingly Light Lemon Tonic, Sipsmith Sloe Gin and a lemon wedge to garnish Fever-Tree Refreshingly Light Lemon Tonic Water 500ml Pour in Sipsmith® Lemon Drizzle gin. The spoon will prevent the tonic … Fill the seasoned cold glass two-thirds with ice, then pour in 1 ½ ounces gin. Fresh slice of lemon (to garnish) Method; 1. 50ml Sipsmith® Lemon Drizzle Gin. Fever-Tree® Mediterranean Tonic Water. 4. Ingredients 1 tbsp fresh lemon juice 6 basil leaves 1 cup ice 1/2 cup gin 1 1/2 cups Tonic more or less to taste Garnish: lemon twist and fresh basil leaves