The heavily advertised commercial refill options want to lock you into their system, so they sell refills made of plastic that only fit into their bottles. It's just pandering to a certain crowd without really helping the problem.
If you search a lot harder, there are some other options. Like for cleaning sprays, there are dry refills that add no plastic and require adding your own liquid, like this one - https://meliorameansbetter.com/collections/homecleaning/prod... - there are others out there, but I've been pretty happy with this product.
I really like that they give full, detailed descriptions of the ingredients. I wish home chemicals had more stringent requirements on ingredient lists, like foods do.
However that's literally just a bar of soap unfortunately, and won't get things the kind of clean I want. I bought one sprayer of caustic bathroom cleaner because they have more resistant sprayer hardware to handle the bleach, and just refill it with cheap bleach or bleach cleaner. The best option would probably be buying bulk dry chlorine at a poll supply store
Oh, agree. For the harsher cleaners I just try to buy large containers of concentrated cleaner from the local hardware store if possible. But for the spray around the house stuff, these types of cleaners are a big step forward from buying a bunch of ugly bottles of mostly water.
If you search a lot harder, there are some other options. Like for cleaning sprays, there are dry refills that add no plastic and require adding your own liquid, like this one - https://meliorameansbetter.com/collections/homecleaning/prod... - there are others out there, but I've been pretty happy with this product.