The precision cap with a silicone ring and the bottle is completely closed. It is perfect for school, office, outdoor, sport, travel, fitness, driving, cycling (bottle holder) and more. Double wall vacuum insulation retains hot or cold temperatures. Features a 'one piece' push button lid which doesn't leak or come apart through the pressure from your hot drink. Press the button to pour your drink into the included small cup. Or drink straight from the flask. To clean, wash it with water and use a clean cloth to dry, but do not use a hard brush to avoid damage the surface. Thermal effect:100 Celsius,after 12hours ,can be kept over 35Celsius in summer, and over 35 Celsius after 6 hours in winter. Capacity:1000ml Colour: sier Material: stainless steel Size: 8*33cm Package Contents: 1 * Thermos CupOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.