The Tom Collins is a classic cocktail made with GIN, LEMON juice, sugar, and SODA water. The ingredients for the drink are LIME, SODA, LEMON, and GIN. LIME is a citrus fruit that is often used to add flavor to drinks and dishes. SODA is a carbonated beverage that adds sweetness and fizz to drinks. LEMON is another citrus fruit that is often used to add tartness and flavor to drinks. GIN is an alcoholic spirit that is distilled from juniper berries and other botanicals. All of these ingredients come together to make the Tom Collins, a refreshing and delicious cocktail.