Finest Assam Green Tea with a hint of butterfly pea flower to create a blue brew as rare as a lunar spectacle. Blue Moon is a caffeine-free herbal concoction that is packed with antioxidants—infused with a hint of butterfly pea flower and lavender along with the finest green tea to create a blue brew as rare as a lunar spectacle. Adding lemon juice to the tea changes the pH of the drink, making it change color from deep blue to purple. Blue tea can also be consumed cold as Iced Tea post meals to aid digestion and promote healthy sleep.