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

https://source-wiki.win/index.php/Why_Does_Thicker_Than_3.5_mm_Wire_Feel_Impossible_to_Bend%3F

Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes for a snug fit