A reliable STP is hard to find! We have tested countless products that have left our brave stand-to-pee reviewers covered in pee, unimpressed with the material, or frustrated with having to wear a harness all day. While this STP is not harness compatible, it is a silicone, semi-realistic product that is hollow. As such, it has generous reservoir space for collecting urine, and a wide urethral opening. Perfect for camping or anytime you need a simple hand-held STP for every day use.