Ferrostat Double Wall Stainless Steel Vacuum Insulation. Retention: 4 Hours. Dishwasher Safe. 5-Year Warranty. Nsf Certified Body And Lid. Ergonomic Grip And Balance, No Drip Lip. Replacement Lids With Colored Content Indicator: (Part 10-00059-Xxx).Date Code: None. Can Be Silk Screened. Product Box: 6.75 X 6.0 X 8.75.