I have found the perfect product for patients! Its the Peepack Medical Grade Apparatus with the Human Resemblance Formula 4.0 Sterile Lab Urine. The hardest aspect of this little adventure for me has been concealing a bottle of urine on me and maintaining proper temperature. The Peepack not only works for all testing, but is so much easier with the medical grade bladder to maintain temperature over anything else. I didn't even have to use a heating pad with it when I kept it down my drawers for 30 minutes. It was very comfortable and the custom fluid release valve was literally completely silent. This product has worked for me numerous times and I wouldn't suggest anything else.