Improved Ice Lock - 2-way & 4-way Configurations

This is an Ice-based timed lock. You can connect 2 or 4 locks to give the captive more ice to melt! I've included a tray to make it easy to freeze the locks. All you need to do is fill the locks with water, add the keys, place the locks in the tray, and set in the freezer. It will take 2-3 hours for enough of the ice to melt to release the key. I recommend using supports and printing with the lock opening on the print bed. I used brims to help ensure the locks printed well.