Sea to Summit's super concentrated Wilderness Wash goes a long, long way and is gentle on fabrics and skin but effective on dishes and laundry stains. It's biodegradable,phosphate and fragrance free. We've also made sure that the bottle it comes in is tough enough and the lid secure enough so you don't have to worry about leakage in your pack or bag. Although Wilderness Wash is biodegradable, we recommend you always Leave No Trace' outdoors - so wash up at least 300 feet from waterways. 3oz bottle meets TSA standard for airplane carry-on