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

https://post-wiki.win/index.php/How_Do_I_Make_Two_Wire_Handles_the_Same_Shape_Every_Time%3F

Give your reclaimed boxes and gift bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength and durability. Drill 3-3.5 mm holes to secure the handles tightly without tearing the material