18 hours cold, 5 hours hot. Specs 18 hours cold, 5 hours hot Spill-proof for mess-free travel Includes spill-proof 360° Sip Lid Pure Taste ceramic-coated interior Made from insulated stainless steel Slim design to fit bike cages & most cup holders Length: 3.13in Weight: 0.80lb Width: 3.13in Height: 8.31in