Four methods to open canned goods without a can opener. If you don't have a traditional can opener on hand, you'll have to get creative.
Most German households have at least one conventional pocket knife, which in many cases has an opener function that can also be used to open cans. If all the previous tricks don't work or can't be carried out, you can also "sand" the lid of the can. You should then dispose of tin cans properly as they can be a danger to animals and environment.