Here's what you'll need to do to make one.
First you'll need to cut your canister in half. I found it's easier to cut the lid in half first and then use that as a gauge for cutting the canister.
When you're done you'll have something like this:
I was going to have my daughter decorate some paper to line the cradle with but then I decided to use fabric. I have tons of scraps, after all.
We smeared tacky glue all over the inside and then rubbed it smooth with our fingers.
I let my daughter pick the fabric she wanted. We cut it out and lined the cradle.
All done. Goodnight baby.