These goldfish bowls were used on fairgrounds in the 1950’s and 1960’s where one had to throw a ping-pong ball into the bowl to win a goldfish. The necks were made narrower than normal to make it harder for one to successfully throw a ball into the bowl and the rims were more pronounced that that string could be tied around it to carry your fish home with you.
The practice of giving goldfish as fairground prizes is still legal in the UK, except for Scotland. There have been several petitions to the UK Government asking for a ban on giving goldfish as fairground prizes.
The oldest living goldfish apparently was Tish, won by a UK family at a funfair.