The classic black Relaxika thermos with high temperature retention capabilities is perfect for hiking, traveling, sports, and daily use. The durable double walls made of high-quality 18/8 stainless steel with vacuum insulation ensure that your drink stays cold for up to 36 hours and hot for up to 30 hours. This material is not only strong but also hygienic, as it does not release any harmful substances. Your drinks will maintain their natural taste and won't acquire any unwanted odors. - Keeps drinks cold for up to 36 hours and hot for up to 30 hours. - The narrow mouth allows for maximum temperature retention. - The thermos lid can be used as a cup. - BPA Free. The plastics used in the production of the thermos do not contain Bisphenol A. - The reliable screw-on cap with a silicone ring prevents leaks and helps maintain temperature. - High-quality 18/8 stainless steel. Care recommendations: Do not use dishwashers to clean the product. Clean with soft sponges and liquid detergents. Avoid using dry abrasive substances to prevent scratching the surface. After washing, dry with a cloth or towel and leave to air dry without the lid. Not suitable for microwave or freezer. To prevent leaks, make sure to securely close the top lid.