Patented Autoseal Technology: Leak and spill-proof design Thermalock Vacuum Insulation: Keeps drinks hot up to 5 hours or cold up to 12 hours One-handed Operation: Push the button to drink and release to seal after every sip Easy-Clean Lid: Opens completely for thorough cleaning and locks for peace of mind Compact Design: Fits in most car cup holders and under most single serve brewers Safe Construction: Free from Styrene, Formaldehyde, and Octamethylcyclotetrasiloxane Sustainable: Composed of Stainless Steel (Iron, Chromium, Nickel, Manganese) for durability and longevity Clean Up – Top rack dishwasher lid, hand wash body All Contigo products are BPA free, have a limited lifetime guarantee and are designed by passionate inventors and innovators who have your mobility in mind