1⁄2 oz Grenadine
1⁄2 oz Gin
1 oz Triple sec, Bols
1 1⁄2 oz Sweet vermouth, Martini & Rossi
3 oz Grapefruit soda (Fill)
Instructions
Stir, strain into ice-filled Collins glass. Top with 3 oz. grapefruit soda water, gentle stir.
Notes
You can easily sub grapefruit soda with grapefruit tonic.
Also I do recommend adding 1/2 oz passion fruit syrup for extended experiences.