Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use...

https://wiki-cable.win/index.php/Cotton_Ribbon_Wrap_for_Handles:_What_Width_Feels_Good_in_the_Hand%3F

Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength and durability. Drill 3-3.5 mm holes into the sides for easy threading