That reminds me - wire together 3 or 4 canning jar rings. YYD, I can tell you don't have cats....the cans have had non-openable bottoms for years, like most every other can. Sometimes the "old" style is used on Asian imported foods.
Further thanks to Miss Priss. A decade-long search ended! Were she a neighbor and a beanie, I would offer one of my seven cassoulets. My Christmas pudding preparation time will be cut by 80% and she will be in my thoughts with much gratitude.