Things They Should Invent: garbage cans that fit plastic bags perfectly (or vice versa)

I line my garbage cans with ordinary plastic bags that I get when buying things from stores. I don't know how common this practise is, but I do know a number of other people who do it, and I've never had anyone say "Why the hell is there a plastic bag in your garbage can?" so it can't be that unusual.

As it happens, Shoppers Drug Mart bags fit perfectly in my bathroom garbage can, but my other garbage cans are not nearly as compatible with plastic bags. Occasionally a bag from a store I rarely shop in will fit perfectly in one of my other garbage cans (and, before the LCBO cheaped out on their plastic bags, LCBO bags used to fit perfectly in my kitchen garbage), but it isn't at all consistent. Bags from Dominion, where I do the vast majority of my shopping, don't fit perfectly in any of my garbage cans.

I think stores like supermarkets, drug stores, walmart, etc., should sell small, indoor garbage cans that are the perfect size and shape for their bags. Or, if it's more cost-effective, they should make their plastic bags the perfect size and shape for garbage cans that are available in the store. I would totally buy new garbage cans if I knew they would perfectly fit plastic bags I have on hand, and I would totally make a point of going to a specific store for something like soap or shampoo (i.e. something that I could easily and conveniently buy at any one of several stores) just to get plastic bags that would fit perfectly in my garbage cans.