This Water Purifier can filter up to 0.26 gal of dirty, contaminated water WITHOUT iodine, chlorine, or other chemicals. It can effectively removes minimum 99.9% of waterborne protozoan parasites down to 0.01 microns. It is shaped and used like a regular straw to suck up and designed with a portable lanyard, making it easy for using and carrying when traveling or doing outdoor activites. Your logo is welcomed.