Astrid Recycled Stainless Steel Double Wall Bottle - 18 oz. features double-wall vacuum insulation, providing excellent temperature retention for hot and cold beverages. Made from recycled stainless steel (SS 304). With a capacity of 18oz , the bottle keeps hot drinks up to 24 hours and cold drinks up to 10 hours. The matching color screw-on lid ensures a leakproof seal, making it perfect for everyday use. Not suitable for dishwashers or microwaves.