"Olive hearts" are the olives in drinks.....the "plastic swords" are the toothpicks/straws/sticks in drinks used to eat those olives........I don't think any part of an olive is called a "heart" so I assume he's saying that his heart is truly at the bottom of a drink.
"Olive hearts" are the olives in drinks.....the "plastic swords" are the toothpicks/straws/sticks in drinks used to eat those olives........I don't think any part of an olive is called a "heart" so I assume he's saying that his heart is truly at the bottom of a drink.