Shock Resistant Sand Timer: Made of durable PVC, high borosilicate glass, sand and protective cover, which ensures the sand timer is not easily broken, durable to use.Widely Use: Perfect for games, classroom use, cooking, exercise, kids brushing (toothbrush), toddler playtime, etc. It can also be used as a decoration. A good gift for children and friends.Take note: This sand timer is not a precise timing device, so there is a time deviation. Moreover, please do not use anything to scratch the words on the glass to prevent the words from falling off.Warm tips:1. Glass becomes fragile under sharp blowing, carefully placed.2. As the timer cannot replace the mechanical watch, please allow +/- 10% deviation.3. Sand into powder Please let it stick or absorb on the glass. Just leave it to dry in the sun or crack.4. Under adult supervision when the child is under 3 years old.Package: 1 X Glass Sandincludes:Products from TONGZHOU's store