Some presets have already been generated, but you can tune it at the customizer. To make it, you will need:

• Wooden sticks: found at any department or hardware store, the ones I used are 30cm of length and 2.5mm of radius. When customising the model, I set the radius to 2.65mm for a tight assembly. If you are not sure, print it with a smaller radius and open it a bit with the tip of a blade/scissors, it is easier than glueing loose sticks.
• Mounting tape: If you don't find a strong one like this or this, you can customize the model to increase the mounting surface. You can test if it holds properly to the wall by sticking a stand full of spices close to the floor for a day.

It has been extensively tested: I printed ~10 different versions to ensure that the weight is properly distributed among the wooden sticks and can hold 3kg of spices on each stand. Six regular spice bottles should not weight more than 300g, so this will hold even if you cook with osmium.

NOTE: After 3 years of use, I haven't found a mounting tape that is strong enough for everyday use; probably my wall isn't porous enough. I ended up sticking it into a wooden wall, and I putting one nail through each mount (probably that was too much), and now it's sturdy and reliable.