Blown glass, sand casting manual production, the process is complex, fine workmanship. The hourglass is made of strong, environmentally friendly, unbreakable, durable and vibration resistant materials. This wood sandglass decor can provide lasting services for you. Solid material, high quality of transparent borosilicate glass and high-end handcraftes are used to make the hour glass sand timer. Ideal for Valentine's day gifts, Birthday gifts, Wedding gifts, kitchen cooking timing, controlling the time of playing games or practice time, Bedroom or Office table ornaments and accessories.