Good day! I buy methylated spirits from Migros and use it to clean parts of technical equipment, a cuckoo clock or a gramophone, things like that. I pour the fuel mixed with old grease and dirt back into the black Migros bottle. The Aesch BL branch has already taken my bottles back several times, two or three or even four times. Today they refused to take them back at the customer service counter. They said I should take them to the recycling center. Can I ask the head office what their stance is on the legal obligation to take back bottles? R.