Isostar bottles designed for prompt drinking, suitable for road cycling, team sports, also for a wide range of sports including hiking, and also for children. A universal sports bottle to prepare and transport drinks, suitable for isotonic drinks and also fizzy drinks, water and tea. The drink should not stay in the bottle longer than 12 hours. The drink can have a maximum permissible temperature of 40 Centigrades. We recommend washing the bottle with drinking water before the first use as well as after each use, and then letting it dry.