The magnets came in a display box but I guess someone had extras and they sold them for use this way.
Here's what I have... there is one set of "puffy magnets" that are Taiwanese Wacky (non Topp sanctioned) ripoffs. The first photo shows 6 of them. I don't know if there are others. The "Peter Pain" shown in the eBay auction is certainly one of these. I don't know how these were originally distributed. The only thing close to a copyright, as noted earlier, is the word Taiwan on each puffy.
The 2nd photo shows a set of 6 "Magnetic signs", which are the same size as the puffy magnets, with a 1974 Nadel and Sons Toy Company copyright and also labeled with Taiwan. I believe the ones shown are the only six. These were sold from a counter-top display box. See photo 3 for a scanned copy of the closed box top.