Cardboard-plastic combinations are a fully sustainable solution but there is one challenge – separating the cardboard wrap from the plastic cup currently requires action by consumers. If they separate the cardboard wrap from the plastic cup when discarding the used packaging, the cup will perform very well in the recycling process. But if they don’t do that – which is still the case for most consumers – the components will not always be correctly identified in the sorting system, making it difficult to correctly recycle the K3® packaging. As a result, the cups are currently quite difficult to recycle properly in some countries.