I found a tutorial online for this emergency sewing kit using a pen blank. Threads wrap around the little turned "spools" and a needle or needles fit inside. The pictures I'm posting have some thin wire wrapped around because I don't know where my wife keeps her thread. If you're interested, plans can be found here. https://bkibby.wordpress.com/2016/04/17/needle-n-thread-case/ My version is some spalted jatoba. It's about the length of a chapstick and 3/4 diameter.