-Advanced Insulation Technology: Double-wall vacuum insulation ensures that your drinks stay hot for up to 8 hours or cold for up to 12 hours, so you can enjoy your beverage at the ideal temperature all day long. -Durable Stainless Steel: Made with sus 304, food-grade stainless steel, this flask is rust-resistant, BPA-free, and built to withstand everyday use. -Leak-Proof & Spill-Proof: The secure, one-handed operated lid provides a tight seal, preventing leaks and spills. Take it with you without worrying about messes. -Ergonomic Design: The sleek, compact design fits comfortably in your hand and most car cup holders, making it easy to carry and drink from on the go. -Multi-Use: Perfect for coffee, tea, water, or any hot or cold beverage. It can also be used as a travel mug or as a portable flask for your favorite drinks. -Easy to Clean: The wide mouth opening allows for easy pouring and cleaning, ensuring that your flask remains hygienic and ready for your next adventure.