Cold to the Last Sip - Matterhorn is prepared to help you handle the heat or the cold. For the Long Haul - Drinks stay icy cold up to 18 hours or piping hot up to 10 hours with THERMALOCK™ Vacuum Insulation Seal It In - Leak proof lid (when closed) for on-the-go activities Big Mouth - Wide mouth ideal for chugging and adding ice cubes Carry On - Carry loop for on-to-go activities Perfect Fit - Fits most car cup holders All Contigo products are BPA free