Does anybody remember a product called flush-a-byes? I think it was in the 1960's, and is a disposable diaper without a waterproof liner. Disposal was by tearing it into 4 pieces and running it down the toilet. No paper, plastic, and human waste in the dump. Pampers ended up the winner in the race, but I think if the same level of environmental interest existed then as does now, they may have caught on.