 SmartWater consists of a liquid containing a code, which presence can be seen under ultraviolet light.It is intended to be applied to valuable items, so that if they are stolen and later recovered by police, their original owner can be determined after laboratory testing of a sample.Another application is a sprinkler system that sprays a burglar with the (invisible) fluid, which cannot be washed off and lasts for months, to generate evidence that connects a suspect to a specific location.