Give your old boxes and bags a sturdy makeover with simple wire handles. Use...

https://wiki-byte.win/index.php/Are_Parallel-Action_Pliers_Worth_It_for_Bending_Wire_Handles%3F

Give your old boxes and bags a sturdy makeover with simple wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes to thread it through