Now you can enjoy great-tasting, safe, clean water on the go, with this stylish stainless steel water filter bottle the first of its kind in the world. Made from 18/18 304 Food Grade Stainless Steel and 100% non-toxic, food grade and BPA-free materials, these bottles are a safe and healthy choice for your whole family. The bottle size is 26.5cm high and 6.5cm wide at the base. The Extreme Filter is the perfect companion for travelling to 3rd World Countries and other areas where radioactive material may interact with the groundwater. There is no need to count the litres, our filters will not expire, but the flow will go slower and slower when it is time to change the filter. Anything that comes through is safe. We remove the same amount of contaminants at the end of the filter life as we do at the beginning. Please note: Using the Extreme Advanced Radiological Filter with a stainless steel filter has a slightly reduced flow (approximately 5% more resistence than a Regular Filter). You will need to suck slightly harder to saturate the filter initially. This filter in the Stainless steel bottle is not advised for children under the age of 8 years old or those who may be unable to drink through any straw.