The ultra-light and compact Frontier Filter from Aquamira easily slips into a daypack, waist pack or travel luggage and is ready when you need it. Carry it as a backup on a multi-day backpacking trip in case larger pump filters clog or become damaged. For maximum protection, the Frontier can be used in conjunction with chemical treatments. To use, simply expand the straw and attach the wide end firmly onto the filter outlet. Fill a bottle or cup from your water source, insert the filter, and drink from the straw. Do not submerge the drinking straw into contaminated water. Allow filter to air dry for 48 hours before storing.