Thermos vacuum insulation technology for maximum temperature retention, hot or cold, keeps liquids hot for 9 hours and cold for 20 hours The lid with one-handed push button operation is made with BPA free Eastman Triton polyester to resist stains and provide durability Built in tea hook, easily holds tea bags or most loose-leaf infusers Fits most automobile cup holders; single serve compatible Dishwasher safe; 16 ounce capacity