Consumers are putting more and more importance on green issues. Companies like Apple, Kenco and Persil have realised that reducing their packaging is a win for everyone. Less packaging obviously leads to fewer truck journeys required for distribution.
One industry to have not cottoned on to this easy way to reduce their environmental impact appears to be the pharmaceutical companies. A picture illustrates the point quite succinctly.
How much space is wasted on this blister pack? Somewhere in the region of 70% by my reckoning.
That said, maybe the drug companies have been busy thinking about other things.