Empty Toilet Paper and Paper Towel Tubes Homemade RattyRat's Review: These tubes can make great treat dispensers! Just throw a couple treats into one, and fold close both ends. Our rats have lots of fun dragging theirs off and chewing through it to get at the tasty surprise it contains. It's like giving them a little gift to open. Want to make it harder for your rats? Wrap the treats in paper towels and then shove them in the tube and close it up. I know, that's just mean!