Tantus Silicone 2" C-Sling
An odd shape, but a brilliant design.
The sling fits around the penis and testicles. Point the tip forward to cradle the family jewels, or turn it around and put pressure on the perineum.
For maximum comfort add a little lubricant to the sling before putting it on. Before an erection, drop one testicle through, then the other, then the penis.