[WORKING PRINCIPLE]: We all think that the taste buds on the tongue reflect our taste, but in fact, the tongue is only responsible for part of the taste experience. use smell to reflect of taste. This is a game to test whether the sense of smell is sensitive. use our sense of smell to experience flavors [SAFE, HEALTHY AND NON- MATERIAL]: is made of food grade environmental protection reusable Tirstan. It is 100% free and will not release harmful chemicals even if used for a long time. It is the for anyone who pursues a healthy lifestyle. The safety of you and your family is our top priority. Suitable for hot and cold drinks(-20-100). []: The sports kettle is fashionable and , suitable for adults and children. It is the best gift for yourself, family, friends, colleagues, women and men who enjoy a healthy lifestyle. Believe me, this fashionable and interesting combination will make your friends and lovers happy. Try different fruit flavors and experience the ultimate drinking pleasure. Colour:B:Gradient Purple Material:Tirstan Size:8x26cm Package Contents: 1 * Bottle 7 * flavor pod 2 * Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.