The indication of a volume of 2.5 litres is consistent with the type of product often used in Brita glass filter jugs. The glass Model ONE Maxtra Pro also has a volume of 2.5 litres, which suggests that it could be a similar product. However, the exact name "Glass Model ONE Maxtra Pro" does not directly refer to the general description of a 2.5 litre Brita glass filter jug.

If you need specific information about this product, I recommend consulting Brita's official product description.