High quality materials and shatter resistant design: The hourglass is made of high borosilicate glass and hard acrylic material, with a sturdy acrylic outer layer and glass inner layer. The double-layer structure effectively prevents shattering, ensuring safety and durability, making it particularly suitable for children's use Time Management Assistant: With 15 and 30 minute timer functions, it helps children or adults better manage their time, improve learning and work efficiency, and is suitable for various scenarios such as cooking, gaming, classroom, study, and desk decoration Safe, environmentally friendly, and humanized design: Hourglass is 100% free of bisphenol A, and other substances PVC、 Harmful substances such as phthalates, the silver patterned top cover is smooth and sturdy, avoiding cuts and ensuring safe use, suitable for daily use by families and children Accurate and reliable quality standards: Complies with the highest industry standards in the United States, with a time deviation of only ± 5%, meeting daily timing needs. Although not a precision instrument, it is accurate and reliable enough User trust and after-sales guarantee: With over 10000 parents and children worldwide choosing, we provide a 100% satisfaction guarantee. If you have any questions, you can contact our after-sales service to ensure worry free purchasing and a good after-sales experience for consumers