Mega toilet rolls...sounds like a bad idea. I mean, unless you are going to use them as normal tissue paper (which I sometimes do), they aren't going to be used at all...you can't put them in the toilet as they can't fit in the holders, and you can't put them around in the bathroom as well as they are so good at getting wet.

Or, well, you can just buy it as a toy for your cat (if you have one). They might love it, if you don't mind cleaning up...