Stainless King series bottles have theri vacuum made in a temperature of over 1000°C. This method is more effective than using a vacuum pump, which is the most common option. The method is also expensive to use, thus chosen only by brands aiming for the sharpest peak of performance. - Material: stainless steel - Top quality performance year after year - Holds your food hot for up to 14 hours, and cold for up to 24 hours - Eating cup - Electro polished inside reduces taste and smell problems - 5 year guarantee against material and manufacturing flaws The bottle is black. Some product images may display other bottle colours.