DURABLE AND SECURE MATERIALS: The outer of hourglass sand is made by high quality hard acrylic and plastic material. And inside sandglass is lead-free, chromium-free, and hand blown technics glass. PERFECT DECORATION: This hourglass is a decent piece for your mantel, office desk, coffee table, book shelf, curio cabinet end tables or as personal collection. BEST CHOICE FOR GIFT: The hourglass timer is a perfect gift for Birthday, Wedding, Mother’s Day, Father’s Day, Thanksgiving Day, Teacher’s Day, Children’s Day, Valentine's Day, Christmas, and all other festivals. GREAT TIME MANAGEMENT TOOL: Ideal for Cooking, Classroom Use, Game Time, Exercising Timer(yoga or psychological training). Also can be used as home office decoration. Great Gift for children and friends.