Recently though, my collection has expanded beyond the capacity of that tin, and I have little stacks on the shelf next to it, little stacks that are easy to knock over and then I have to hunt them down from wherever they roll to.
I used a glue stick to adhere the paper to the tin, and covered the join with washi tape (what else?).
I'm happy that my washi tape rolls can't escape any more, I've used a tin that I was keeping 'in case it's useful', and I even have room for a few more rolls. However, I think that two tins should be my limit. They hold about 25 rolls each, and no-one needs more than 50 rolls of washi tape, do they?