Give your old boxes and bags a practical upgrade by adding sturdy wire handles....

https://wiki-byte.win/index.php/My_Hands_Go_Numb_Carrying_Boxes:_What_Handle_Shape_Helps%3F

Give your old boxes and bags a practical upgrade by adding sturdy wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes to secure the handles easily