Tierr@_de_Nadie: Some lessons to take into account from the German experience. Despite an apparent success of this scheme some questions arise concerning the environmental efficacy of this measure. Since the introduction of the scheme, the overall percentage of reusable bottles has actually sunk from about 80% to below 50%.
People working in the drinks industry say the introduction of the DRS scheme has actually forced German discount giants such as Aldi and Lidl to switch exclusively to non-reusable bottles made out of polyethylene terephthalate (PET), to streamline the return process. PET plastic bottles are also attractive for customers: they are light to carry in bulk and, unlike glass bottles, they do not have to be returned at the same retailer where they were purchased.
Source (The Guardian): Has Germany hit the jackpot of recycling? The jury’s still out | World news | The Guardian