[majewsky]

Re: one-way bottles, it was not always that easy. When the one-way deposit was introduced in ~2004, shops were only required to take their own SKUs back. This was absolutely horrible for consumers and producers alike, so retailers introduced the shared system voluntarily.

[fkistner]

Good point. Fortunately, that seems to have been mandated by law since 2006 (at least for stores larger than 200m² ≅ 2150 sq ft).