Phallosan
I tried this concept and it was very promising. For the fist time I could wear an ADS for more than 1 hour. However I have not been able to find the right kind of bottle cap or similar, because all I could find is too rigid. After a while, the foreskin gets stretched too far at one spot because the cap does not adapt to the glans’ shape, and it hurts like hell.
I was thinking about a more flexible, rubber kind of solution, and I have literally scanned EVERY aisle in two hardware stores to find something that is the shape of my glans, but made of rubber. No success.
BTW, what you guys have invented here is sold as a penis extension device called phallosan. They are selling “slip over condoms” which are much like what we described here. They claim that a Men’s Health article found it to be the only PE device that actually works. I would spend the 200 € but I don’t have a chance to have it shipped to me in privacy because my wife would be home accepting the packet.