The Thunderelu 590ml Stainless Steel Straw Bottle is designed with double wall vacuum insulation, keeping drinks hot for up to 6 hours and cold for up to 24 hours. Made from recycled stainless steel (304), the bottle features a sleek powder coating finish and a leakproof screw on lid. It has a dual opening design, the top opens for easy sipping, with a wider opening just below, for easy filling and cleaning. With a capacity of ml, its perfect for both hot and cold beverages. This bottle is BPA free and not suitable for dishwashers or microwaves.