I would reccomend printing the lid with supports! Other than that, this tool is great for making ice cubes in a perfect shape! Print it with ONLY food-safe material, such as PLA, PETG and so on, if you are printing in a food-safe material, and still see the ice cubes has a different/weird color, i would reccomend throwing them out, and trying again, if it does not go away even after the second try, maybe try printing it with a different type of PLA/PETG, or whatever food-safe material that you are using.

Please note:

if you feel like your mould needs to be washed, DO NOT put it in the dishwasher, it will probably melt, and could break your mould, and if your unlucky, even the whole dishwasher.

Instructions:

When you have all of the parts done printing,  it's quite simple, you first wash up the mould with soap and water, after that you can begin filling the water in the shapes, when all of the shapes is full of water, slide on the lid, and place it in the freezer, so that it stands up, and is in a stable position.

Now wait until the ice cubes are ready, and remove the lid, then turn the mould upside down, and punch it against the table/cuttingboard, if it still does not come out, then wait a few minutes and the problem should be fixed, if it still is not fixed then try putting the mould under some warm water for about 5 seconds, and that should now most curtainly fix the issue.

Now sit back, relax, and enjoy your favorite drink with ice cold ice cubes!