In Pickler, the different thicknesses of foil don't affect the eco-score comparison, as it's based on 1 kg of packaging material. This allows for fair comparisons regardless of size or thickness. However, the energy needed for rolling thin aluminum sheets (7-12μm thick) is taken into account during the calculation. While weight reduction won't lower the eco-score, it may reduce eco-costs and carbon emissions, which are important for optimizing environmental impact.