Insulation: Double-walled stainless steel bottle is designed to keep your drinks hot or cold for several hours. The cap is also double walled adding extra insulation to increase the shelf life of both hot and cold beverages. Made of stainless steel. Odour-free: It does not retain traces of odors or flavors of its previous content after washing. Thanks to its stainless steel material, it repels odors and if cleaning is very easy, it is quick to remove any remaining coffee, milk or juice. you can take it anywhere without worrying about leaks in your travel bag, gym bag or lunch bag for work. No condensation: Forget marks on your work desk, on your table, in your bag or backpacks . With the double-wall design, the temperature is isolated to avoid those annoying condensation stains due to the temperature of the drink. Made of 18/8 stainless steel; available in more colors and capacities: 350 ml, 500 ml, 750 ml, 1500 mlNerthus is committed to ecological awareness and respect for our environment. eco friendly! ACCESSORIES: Straw Cap: Cap + straw: it is weighed to facilitate its use and quick access to the contents of the bottle and thus avoid opening and closing the bottle every time we have to hydrate. Keychain Carabiner: Carabiner for 350 ml and 500 Nerthus bottles ml.Neoprene Cover: Insulating cover that helps maintain the temperature of your drink.Cleaning Brush: Brush designed to facilitate the cleaning of Nertubottles bottles.