The Filter Cap is a practical accessory for drinking bottles that has been specially developed for models with a 42 mm screw cap. This filter cap makes it possible to filter water from various sources and drink it safely, making it ideal for outdoor activities, travelling or everyday use. The filter is lightweight and easy to handle, so it can be easily screwed onto the corresponding bottles. With this product, users can ensure that they have access to clean drinking water at all times without having to compromise on quality. The filter is made of robust plastic and offers a reliable solution for water treatment.