Rubber Grips For Milk Crates
thingiverse
People camping from their vehicles had these designed for them. For the full story, click http://diycarcamping.com/2014/12/05/stop-slips-with-3d-printed-crate-toppers/. They're available to buy on that site if 3D printing in flexible materials isn't possible.
Download Model from thingiverse
With this file you will be able to print Rubber Grips For Milk Crates 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 Rubber Grips For Milk Crates.