Keep Your Drinks At The Perfect Temperature The Brave 32Oz Tumbler With Straw Features Tempguard Vacuum Insulation Technology, Ensuring Your Drinks Stay Cold For Up To 24 Hours Or Hot For Up To 12 Hours. Whether You Need A Refreshing Sip Of Cold Water After A Workout Or A Hot Coffee On A Winter Morning, This Mug Maintains The Perfect Temperature For Longer. Choose The Perfect Lid For Every Situation—Use The Safety Lid For Spill-Free Cold Drinks Or The G-Lid For Straw-Friendly Sipping On The Go. Safe, Durable And Eco-Friendly Made Of Sus304 Stainless Steel (18/8 Food-Grade), This Mug Is Bpa-Free, Lead-Free, Rust-Resistant And Non-Toxic. Unlike Plastic Cups That May Leach Chemicals, Our Mug Ensures Pure, Fresh Taste With Every Sip.