For: Valentine's Day Gifts, Birthday Gifts, Kitchen Cooking, Playing Games or Practice Time, Wedding Gifts, Bedroom or Study or Office, Crafts, Decoration Ornament, Personal Collection , Classroom, Table Decoration, Restaurant, Living Room, Home, Christmas and New Year Festival, Coffee Table, Book Shelf These sand timers are designed for daily use, not as a timer precision, with maybe 6% deviations in time and size. The sands flow speed can be affected by temperature and humidity. To make the hourglass, strong material, high quality borosilicate glass and high-end handcrafts. With luxury craftsmanship and modern fashion outline, it is exquisite and beautiful, silently recording every second. Slow flowing sand, you can enjoy the beautiful weather and the wonderful memories. And it's a COOL timer because the hourglass makes timing more fun. Sand, shining like stars, makes your space more boring