So far, I’ve been unable to find a device that doesn’t eventually fall off because my testicles are small to begin with, and will squeeze between the ring and cage even if the opening is 1/8” or so. They will compress and do what I call ‘turtle’ where they retract into my body. The longest I’ve been able to wear one is a few days. Once the testicles are outside the ring, the cage slides off inside my panties.
I’d like a device that would comfortably stay in place. I’ve tried a half dozen models without any luck.