Calamansi is a small citrus fruit commonly found in Southeast Asia, including Singapore. The Calamansi Gin and Tonic is a zesty and refreshing cocktail that combines the flavors of calamansi juice, gin, tonic water, and a touch of sweetness. This cocktail is a citrus lover's dream and is perfect for those who enjoy a classic gin and tonic with a twist. The Calamansi Gin and Tonic is a popular choice among locals and visitors alike.