The thermos bottle and lid are BPA free and aluminium free. The material is unreactive, non-toxic and the components of the material do not penetrate the liquid.
The thermos bottle keeps your drink hot for up to 24 hours and cold up to 12 hours. The double wall and vacuum insulation act as a barrier to heat transfer, so the temperature outside the flask does not affect the temperature of the liquid inside.
The high-quality 18/8 stainless steel makes for a product that will last. The bottle does not smash if it falls to the ground and it retains its function.