Water-To-Go water filtration system is a world-wide brand which produces an on-the-go filtration system that allows you to drink water from almost any source. This filtration system kills 99.9% of all bacteria, viruses, protozoa, fluoride, chlorine, waterborne disease, heavy metals, bad tastes and odour as your drink it. The water can be sourced from almost anywhere, with the exception of sea water. The filters for this bottle can be so easily replaced and last for 3 months or 200 litre of water. That is the equivalent of 2 litres of fresh, clean and free every day for 3 months! The bottles are BPA free and eco safe.