Watermelon essence and other natural flavors. 0 calories. Hint is vegan and free of sugar, sweeteners, MSG, nut, soy, gluten and preservatives. Non GMO Certified by NSF. 0 sweeteners. Water that makes water love you. Whole 30 Approved. hintgreen.com. (at)hint. Learn more about our BPA-free bottles at hintgreen.com.