it's not a sounding tool, it's a "i have significant trouble getting or staying up, or significant trouble with urinary continence, or both: and have a penis, and do not want to use a traditional catheter" tool. dad used them when he was dying and losing control of (all of) his muscles so he wouldn't wet the bed at night at 65. it's basically a condom that, instead of having a little bubble for semen at the end, it has a non-inserted catheter, so you can urinate into it. they make at-home catheter management a lot easier, as foleys only safely last a month to my knowledge.