The zipper puller on my rucksack has broken off and I was wondering how it could be repaired.

My model is big enough to be able to use a 4mm paracord. Of course, you can also use any other thread/cord that is available. However, if the thread is too fine, the model may have to be scaled down.

The pendant does not need to be glued. It can therefore be removed  without any problems.