HOT TO GO: The Hydro Flask 28 oz (828 ml) Hot Flask & Cup is designed for all-day hydration, whether at home or on the move. IDEAL TEMPERATURE CONTROL: TempShield double-wall vacuum insulation keeps drinks hot for up to 30 hours and cold for up to 30 hours. LEAKPROOF WHEN CLOSED: Pour-through cap seals securely for worry-free transport and easy serving. INTEGRATED CUP AND POURING: Includes a cup that attaches to the bottle and a pour-through cap for smooth, controlled pouring. DURABLE STAINLESS STEEL: Built for long-lasting performance with a comfortable carrying handle; dishwasher safe for easy cleaning.