Ailines missing a trick with masks
Airlines that don't supply masks free in CoVid19 times could let the demand for masks improve their income. Sell them at checkin and when they check at boarding that all passengers where masks they should at the same time offer them for sale. Also on board for they who need a replacment. Charge somthing that can easily be bagged and counted later. The mask itself is the receipt for they who asks. Since Lidl is charging 49 Euro for a pack of 50 masks I would suggest to charge 2 Euro per masks to passengers. Or 20 Nkr. Basically something round at a common coin size that can be easily collected handsfree and don't require change.