Deposit towers are supposed to help against litter. In the deposit tower, the bottles are stacked face down by being pushed up into the tube through a side opening at the bottom and no longer slip out.
The return stations, each with a maximum of eight bottles or beverage cans, are emptied by building yard employees on their routine disposal tour through the town. In most cases, people in need or pensioners have already discovered the deposited item and used it to pad out their shopping budget when returning it to the supermarket or drinks store.