Dishwasher Safe, Food Grade, Insulated Water Bottle. inner surface made of high-grade, double walled stainless steel with a smooth, easy to clean finish. Inner and outer body made of high-grade 18/8 stainless steel, without any glass. Double wall stainless steel with vacum insulation keep contents cold / hot for hours. . Wide mouth easy to put ice cubes.The easiest way to enjoy a beverage. Anytime. Anywhere. Offers convenience while travelling. Do not use in micowave or in dishwasher. Wash the bottle before use.