Anyone know if this exists, and if so, where to get it?

So I finally had some time and listened to the Gator Girls story from Erotic Habit (this one: https://erotichabit.com/asmr/gator-girls/ ) and they make mention if a “nut cuff”. I was curious if this device exists as described, and where one might purchase it if it does. Please and thank you for any advice!