Speculative legends aside, these cuff links (measuring less than an inch each way and fillable with regular lighter fluid) really were dispensed by gumball machines around 50 years ago. Today, such a story would make the evening news after some kid threatened to burn down his school with part of his dad’s suit.
One Etsy seller had the unused lighters on sale at their store. Sadly, the cuff links are now sold out. [technabob]