The blue butterfly blue pea flower has started taking menus in Australia by storm. Officially a perennial herbaceous legume, the blue butterfly pea flower has become a popular item on trendy café menus in recent times but has been used throughout Asia for generations. The modern uses for these fantastic flowers include blue lattes and colour-changing gin. Blue in the bottle, the gin turns pink when tonic water or another carbonated mixer is used. Said to be high in antioxidants these pretty flowers create a vivid blue tea, add citrus and watch the colour change! It is known throughout Asia to be possibly beneficial for hair strength and growth.