Clip Bed
thingiverse
I've created clips for Prusa i3 Cristal's hotbed. The ideal approach is to print it in ABS so that it can withstand the bed's temperatures, although the model in the photo was printed in PLA since I make my PLA prints with a cold bed. I'll be uploading an updated version that's a bit thinner soon.
Download Model from thingiverse
With this file you will be able to print Clip Bed 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 Clip Bed.