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

https://extra-wiki.win/index.php/How_Do_I_Keep_Wire_Handles_from_Rusting_if_I_Store_Boxes_in_a_Basement%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 to fit the wire snugly