I have a beagle that would second that emotion!
They've done large rolls of tubeless TP for office building restrooms (and no doubt other commercial spaces) for several years now. Back in 2008, the management company for my employer's leased buildings did a fair amount of bragging about going green and how many trees the lack of tubes was going to save.
If you're a good parent, you'll clean and sterilize the spring-loaded roller after every roll.
I really look forward to hearing what you have to say. I do moderate comments, but non-spam comments will take less than 24 hours to appear... Thanks!