For delivering the candies to the visitors, we use four lockers. The ticket you have received at the beginning, is used to open the locker containing your own candy. The current version uses an iris-like mechanism, you can see it in the picture (click on it to see it on Youtube in action):
I am planning to upgrade the lockers to a new door mechanism, the so called torggler doors. It is named after its inventor Klemens Torggler.
Below you find a Youtube video containing the first proof of concept.
The mechanism will be improved in the coming weeks. Stay tuned!
Enjoy, Hans