The ALBOR 30oz Tumbler boasts triple-insulated stainless steel vacuum technology, featuring a copper inner layer that prevents heat transfer to the outer walls. This leads to extended insulation compared to competitors, keeping hot drinks hot and cold drinks cold. It also includes bonus features such as 2 stainless steel straws, a cleaning brush, a linen bag for storage, and a removable color-matching handle. The travel tumbler is 100% leak-proof, offering two lids: a splash-resistant, spill-proof sipper lid with a straw and a user-friendly drinking hole, along with a convenient ergonomic slider for easy sealing.