the latest spammer "Traditional Healer And Lost Love Spell Caster In South Africa" Apologies for repeating a spam title but I did LOL at this one
According to Wikipedia, they were designed and patented by Hiram Codd of Camberwell, London in 1872 for carbonated soft drinks. https://en.wikipedia.org/wiki/Codd-neck_bottle They turn up at antique fairs from time to time. Wikipedia does say that they are still used in Japan as you say. They seem to have fallen out of use in the UK, presumably because of a shortage of testicle donors.
Sean is walking down the street past Paddy's house. Paddy is sitting on his front steps and asks Sean where he's going. Sean says he's going to Brian O'Leary's wake. Pady says "I didn't know the man, but I'll go along with you." As they pass a small pub, they decide to go in to down a couple in Brian's memory. A few hours pass and they stumble out and head for the funeral parlor. They stagger in and Paddy goes over to the piano, sits on the piano bench and starts crying his eyes out. Sean says "I thought you didn't know the man." "I didn't." says Paddy. "But he has the most beautiful set of teeth I've ever seen!"