You want to keep your sharp & pointy stuff in a container that you won't accidentally grab and the stuff won't poke thru. You can use anything that won't easily crush. A small cardboard box would work
A couple years ago, Connecting Threads carried a very hard sided pencil case for this purpose. They must not have sold well because eventually they marked them down to $0.79. I bought a dozen & gave them as stocking stuffers to all my quilting friends. They hold many (but on all) brands of cutters and a single extra blade in one of those plastic clamshell holders.