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

https://packagingrevolution.net/add-wire-handles-to-boxes-and-bags/

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