Here are photos of my first prototype. I was pleased with the results, however I needed to make a couple of tweaks for the final model. I decided to scale the whole package down by 35% because I realized that I didn’t need to use as much cardboard as expected. I also reduced the size because when the bottles fit in the hole, they would slip down inside because there was nothing keeping them from staying there. I also changed the direction of the triangles for the hole. Instead of being pushed in, I pushed them out so that it is easier for the user to take the beer bottle out. The triangle spikes also resemble an urchin when they are pushed out.