This plastic hourglass is made of safe and healthy plastic, which does not contain any harmful substances to the environment or human body. It is safe, non-toxic, of excellent quality and durable. Unique hexagonal shape make it looks novel and fashion. The special design of the top and bottom ensure that the timer clock can stand on a variety of horizontal tables smoothly and will not fall down easily. This hour glass has a unique design and beautiful color. The exterior of this sand timer can be selected in different colors. The rich colors guarantee that you'll find the timer you like best. The specific timing of each sand watch is taped to the top of the plastic lid, ensuring that you can quickly get the right hourglass for your various timing activities without causing trouble or confusion.