The plans, originally announced last year and initially intended to cover glass bottles up to 1.5 liters and plastic bottles up to 3 liters, will be extended to also include aluminum cans with a volume up to 1 liter, Deputy Climate Minister Jacek Ozdoba said last week, reported news portal Notesfrompoland.

The programme will be optional for small shops – those with an area of up to 100 square metres – while larger stores will be required by law to implement the system if they stock products sold in bottles or cans.

The legislation paving the way for the new system is expected to be unveiled later in June. It will come into force from the beginning of next year, with a transition period for businesses lasting at least two years, the deputy minister said.