What type of juice is added to a Bahama Mama to fill the glass?

In a Bahama Mama, pineapple juice is added to fill the glass primarily because it complements the other ingredients in the cocktail while enhancing its tropical flavor profile. The sweetness and acidity of pineapple juice provide a refreshing balance to the rum, coconut cream, and grenadine typically used in this drink, resulting in a well-rounded and flavorful cocktail.

Pineapple juice also contributes to the visual appeal of the Bahama Mama with its vibrant color, creating an inviting presentation that captures the essence of a tropical paradise. This tropical theme is central to the cocktail's identity, making pineapple juice the ideal choice for filling the glass.