An industry-led scheme in Norway is credited with increasing plastic bottle recycling levels to 97 per cent. Consumers pay a small additional charge on each bottle they buy. When the bottle is returned either to the shop or a recycling machine, the deposit is refunded. Shops are given a small handling fee for taking the returned bottles. Recycling machines - often found in supermarkets - read the barcodes of the bottles and usually offer customers vouchers for the shop, or the option of making a charitable donation.