Hermetic cap – with its clever design, the cap ensures that the thermo-insulated bottle is 100% safe against spillage of liquids, even when used for carbonated drinks! Attention – do not fill the volume to the very top, leave at least 2cm from the cap line. Made of 18/8 stainless steel. Coating – high-quality multi-layer coating provides wonderful, different color options and creates a pleasant surface to grip. Stainless steel outer wall – the durable stainless steel outer wall seals the vacuum in the bottle and provides thermal insulation for the bottle. Vacuum – thanks to the vacuum insulation located between the stainless steel walls, the temperature effect between the beverage in the bottle and the external environment is very slow, so the beverage remains hot/cold for a longer time – up to 12 hours. Inner stainless steel wall with copper coating – the inner wall is made of food-safe stainless steel, the outside of which is coated with a copper layer, thus ensuring the accumulation of heat energy and improving the thermal insulation properties of stainless steel. Lurch vacuum insulated thermos bottles are made of stainless steel, polypropylene and silicone - each material has been tested at a testing institute in Germany, they are absolutely safe for contact with food, neutral in taste and BPA-free!