I was tired of my ice cube tray taking up so much real estate in my freezer, so i measured it out and printed it up. The print here (pink ABS) actually curled so much that I ended it right as it was going to fail (it is about 1/3 the length that is in the model), but, hey, it worked! I'd suggest PLA since the surface area needed on the build platform is quite large. If anyone needs the freezer or ice cube tray make, i can look it up for you. I will say that the hooks are 2mm wide and fit snuggly. I'll include the openSCAD file so you can adjust to your freezer/tray needs.