This product makes a great gift. Clip the bottle onto yourself, pack, or just throw it into the boat. Instantly makes any body of water a potential water supply. Just fill up the bottle and suck up the filtered goodness through the built in straw lid. Now you can literally make the South Branch a part of you. How often have you been wading in a nice cold river and realized you forgot to bring your water. Not wanting to get sick, you simply keep fishing, parched and grumpy. Now you have a way to get a fresh drink with you always.