Blue; 500ml-Reusable Stainless Steel Water Bottle | Airtight and Thermal | BPA-Free | Insulated, Keeps Cold for 24H and Hot for 12H. Double-Walled Vacuum Leakproof | (XK500 XK750 999 1099 SYSTEM) COLD DRINKS FOR 24 HOURS - HOT DRINKS FOR 12 HOURS - The insulation of the stainless steel bottle completely isolates its contents, ensuring that the temperature is perfectly preserved. The double-wall insulation of the thermal bottle maintains the internal temperature regardless of the external temperature, keeping drinks cold for more than 24 hours and hot for more than 12 hours. ECO-FRIENDLY AND FOOD SAFE, BPA-FREE - BPA-free and made of the highest quality 304 stainless steel. It won't rust inside or out and preserves the flavor of your favorite drinks. Say goodbye to disposable plastic bottles thanks to this reusable bottle. LEAK-PROOF - The screw-on cap and sealing technology make the Mi Ko Mi Ka stainless steel water bottle completely leak-proof. Premium materials ensure our lightweight and durable bottles are the perfect companion for even the most demanding adventures. Tested under rigorous standards, you can trust Mi Ko Mi Ka thermos bottles for everything from the gym to a mountain getaway without spilling a drop. MULTIPURPOSE - Our bottles are ideal for everyday use or for taking anywhere: hiking, cycling, the beach, camping, the gym, the office, or in the car. Simple and practical, they make the perfect gift for friends, family, children, or coworkers. These reusable water bottles are a sure hit for your outings. SATISFACTION GUARANTEED - We offer a quality guarantee and 100% satisfaction or a full refund, no questions asked. A guarantee on all our products is synonymous with quality.