Closeman is a plastic device that can be used to reseal open boxes and bags including tetrapak, plastic bags, etc. See also closeman.com (in Swedish), last checked February 2022.
Closeman can also be used as a clothespin by threading a string through the hole in Closeman and attaching it to a line. Clothing can then be attached to Closeman.
Closeman works for both right and left-handed persons.
Two hands with rather good function are needed to use Closeman as a clothespin; however, it is easy to take down clothing from the laundry line with only one hand, even with compromised function.