<b>AQUACREST: Quality Water Quality Life</b><br><br> <b>Compatible Models:</b> Interchangeable with Light, Travel, Big, Royal, Imperial and Crown Series. <br><br> <b>Easy to Use:</b> You can use it at home as well as outdoors, like hiking, camping, etc. It is convenient to use in many occasions.<br><br> <b>Normal TDS Value:</b> TDS stands for total dissolved solids, is composed of inorganic salts and a small amount of organic matter. Our filter cannot obviously lower TDS value because it uses coconut shell activated carbon that can filter harmful substances while keeping beneficial calcium, magnesium, which is the main component of inorganic salts.<br><br> <b>Protect the Environment:</b> Reduce the use of bottled water and thus protect the environment.