Once long ago one of my cats urinated in my roomies timbuk (i presume she was mad at him and the bag smelled more like him thatn anything else) Both ready for work next morning he (wearing the bag) and I walked around the apartment for several minutes trying to determine the location of the offending odour before discovering it in the bag, the liner kept in the bag and off his clothes so he didnt have to change but his radio, waybills, a t-shirt, tools and tube and a magazine he just bought were comletely saturated. He washed the radio tools and tube in the sink, got an old bag and left late but he was PISSED, which i presume was my kitties intention