Contigo 16oz Autoseal Randolph Travel Mug, Latte AUTOSEAL technology is leak and spill proof Easy one-handed drinking with the push of a button Drinks stay hot up to 4 hours and cold up to 12 with THERMALOCK Vacuum Insulation Fits most car cup holders and under most single serve brewers Easy clean lid completely opens for an extra squeaky clean with no separate parts to take apart or misplace