Keep your drink fresher for longer: The unique 4th-generation Bozio stainless steel bottle features triple-wall copper-plated insulation, keeping your drink cold for up to 48 hours and hot for 24 hours, ensuring a refreshingly cool beverage with every sip. Two lids for added convenience: It comes with a dustproof straw lid and an easy-to-use drinking spout, making it perfect for your games and sports. Both lids are equipped with airtight silicone seals, ensuring 100% leak resistance.