Personalized Taste the Rainbow Unicorn T-Shirt. Taste the rainbow like this magical unicorn has done! It will blow your mind! Show your friends you've tasted the rainbow today! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.