I’m not sure what point you’re trying to make anymore. You asked if people actually have these things. We do. Why does this need to scale? If you want to be ped

I’m not sure what point you’re trying to make anymore. You asked if people actually have these things. We do. Why does this need to scale? If you want to be pedantic, anyone can make themselves an activated charcoal water filter using fire, wood, half a plastic bottle and some rocks and straw and stuff. If you’re on the Internet you already have access to this knowledge.