Elastic threading needles
thingiverse
Here are some custom elastic threading needles I designed to make it easier for my wife to thread elastic while dressmaking. Just print out the needle you want, and adjust the hole size if necessary - a little smaller than the elastic works fine. Then, feed the elastic through as shown in the picture or use your own method that works best for you (I used some yarn since I didn't have any elastic handy). If the scale is not visible, simply zoom in or out horizontally by sliding the Z slider to resize. It's amazing how convenient it is having a 3D printer around.
With this file you will be able to print Elastic threading needles with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Elastic threading needles.