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

https://direct-wiki.win/index.php/Why_Do_My_Paper_Bag_Handles_Tear_Right_at_the_Hole%3F

Give your reclaimed boxes and bags a sturdy upgrade by adding simple wire handles. Use 2-3 mm galvanized wire to ensure strength and rust resistance. Drill 3-3.5 mm holes where you want the handles, then bend and twist the wire secure