Thermal bottle with AISI-304 stainless steel interior, a material commonly used in the food industry. This material is very durable and long-lasting, ensuring consistent performance over time. The exterior is made of AISI-201 stainless steel, which has the same characteristics as the inner steel but is lighter. The two layers of steel are separated by an air chamber that guarantees total insulation without dissipating the temperature of the liquid inside. Thanks to this air chamber, the bottle can keep hot beverages at an ideal temperature for 20 hours and cold beverages for 10 hours. Volume: 500 ml. Materials: Stainless steel. Cold retention: 10 h. Hot retention: 20 h. Cap type: Screw cap. Airtight. Double wall. Does not contain: Bisphenol A (BPA). Height: 270 mm. Diameter: 7 cm.