Mercury The First planet on our Solar System Journey: Mercury. Your Bonzo's will love the dark mysterious color and Fragrance of this bath fizzy bomb. Size 5oz = 2.25" Diameter DIRECTIONS: Enter your water-filled bath tub. Drop the Bath Bomb in the tub and enjoy your spa-like experience! INGREDIENTS: Sodium Bicarbonate, Citric Acid, Sea Salt, Sunflower Oil, Organic Shea Butter, Fragrance, FD&C colorant.