From Par Avion Tea, Color Changing Unicorn Tears Green Tea. "From the Color Changing Collection, Unicorn Tears Tea is delicious color-changing green tea with rose hip and natural flavors. All you need is water for it to turn a deep midnight-colbalt [sic] blue. Squeeze a lemon and it transform into a rich violet. Enjoy its delicious magic morning, afternoon or evening." With green tea, rosehip, blue pea flowers, blue cornflower petals, hawthorne fruit and natural flavors, $17 at Saks.